黑芝麻作为一种常见的食材，在亚洲乃至全球各地都有广泛的应用。无论是在糕点、面食还是甜品中，黑芝麻都被用来增添香味和口感。然而，许多人却发现黑芝麻有苦涩的味道。那么，为什么黑芝麻会苦呢？让我们来探究一下。

There are many reasons why black sesame seeds taste bitter. First and foremost, it is important to note that bitterness is a characteristic flavor of black sesame seeds, similar to other types of seeds and nuts. However, the intensity of bitterness can vary depending on several factors such as the quality of the seeds and the way they are processed.

有很多原因导致黑芝麻味苦。首先，需要指出的是，苦味是黑芝麻的特征味道，类似于其他类型的种子和坚果。然而，苦味的强度会受到几个因素的影响，比如种子的质量和加工方式。

One reason for the bitterness of black sesame seeds is their high oil content. Sesame seeds have a natural oil called sesamolin, which contains compounds such as sesamol and sesamin. These compounds contribute to the distinct flavor of sesame seeds but can also result in bitterness when consumed in large quantities or when the seeds are over-roasted. Therefore, proper roasting techniques are necessary to prevent the bitterness.

黑芝麻味苦的原因之一是其高油含量。芝麻种子含有一种天然油脂，称为芝麻素，其中包含了芝麻酚和芝麻素等化合物。这些化合物赋予了芝麻种子独特的风味，但在大量食用或者过度烘烤时会导致苦味。因此，适当的烘烤技巧是防止苦味的关键。

Furthermore, the bitterness of black sesame seeds can be intensified if they are not properly stored. Sesame seeds, like other seeds and nuts, contain natural oils that can turn rancid over time when exposed to air, light, and heat. Rancid sesame seeds not only lose their nutritional value but also develop a stronger bitter taste. Therefore, it is crucial to store black sesame seeds in a cool, dry place in airtight containers to maintain their freshness and prevent bitterness.

此外，如果黑芝麻储存不当，它们的苦味可能会加重。与其他种子和坚果一样，芝麻种子含有天然油脂，暴露在空气、光线和热源下时间过长会变质。变质的芝麻种子不仅失去了营养价值，还会产生更强烈的苦味。因此，关键是将黑芝麻存放在干燥、阴凉的地方，使用密封容器来保持其新鲜度，防止苦味的产生。

Lastly, the bitterness of black sesame seeds can also be influenced by personal taste preferences. Taste perception is subjective, and what may taste bitter to one person might be enjoyable to another. Some individuals are more sensitive to bitter flavors than others, and this can affect their experience with black sesame seeds. It is important to take individual differences into account when evaluating the bitterness of black sesame seeds.

最后，黑芝麻的苦味也会受到个人口味偏好的影响。味觉感知是主观的，对一个人来说可能苦味，但对另一个人来说可能很美味。有些人对苦味的敏感程度比其他人更高，这可能会影响他们对黑芝麻的体验。在评估黑芝麻的苦味时，考虑到个体差异是很重要的。

In conclusion, the bitterness of black sesame seeds can be attributed to their high oil content, improper storage, and individual taste preferences. By understanding these factors, we can better appreciate and enjoy the unique flavor of black sesame seeds in various culinary applications.

总结一下，黑芝麻的苦味可以归因于其高油含量、储存不当以及个体的口味偏好。通过了解这些因素，我们可以更好地欣赏和享受黑芝麻在各种烹饪中的独特风味。

English Translation:

As to why black sesame seeds taste bitter, there are several factors that contribute to it. The bitterness is a characteristic flavor of black sesame seeds, similar to other types of seeds and nuts. The intensity of bitterness can vary depending on factors like seed quality and processing methods.

One of the reasons for the bitterness is the high oil content in black sesame seeds. Sesame seeds contain a natural oil called sesamolin, which contains compounds like sesamol and sesamin. These compounds contribute to the distinct flavor but can also result in bitterness when consumed in large quantities or when the seeds are over-roasted. Proper roasting techniques are necessary to prevent bitterness.

Improper storage can also intensify the bitterness of black sesame seeds. Sesame seeds, like other seeds and nuts, contain natural oils that can turn rancid over time when exposed to air, light, and heat. Rancid sesame seeds not only lose their nutritional value but also develop a stronger bitter taste. It is crucial to store black sesame seeds in a cool, dry place in airtight containers to maintain their freshness and prevent bitterness.

Lastly, personal taste preferences can influence the perception of bitterness. Taste perception is subjective, and some individuals may be more sensitive to bitter flavors than others. Taking individual differences into account is important when evaluating the bitterness of black sesame seeds.

In conclusion, the bitterness of black sesame seeds can be attributed to their high oil content, improper storage, and individual taste preferences. By understanding these factors, we can better appreciate and enjoy the unique flavor of black sesame seeds in various culinary applications.