中文：

题材板块是指由同一行业、同一领域或同一主题的股票组成的投资板块。这些股票通常具有相似的市场表现、行业地位和盈利能力，因此被归为同一题材板块。

题材板块的出现是由于市场投资者的投资偏好和投资策略的需要。投资者通常会根据行业、领域或主题来选择投资目标，因此将股票分类为不同的题材板块有助于投资者更好地把握市场趋势和投资机会。

题材板块在投资策略中扮演着重要的角色。投资者可以通过对某个题材板块的投资来获得该领域的市场机会，同时也可以通过对不同题材板块的配置来分散投资风险。

常见的题材板块包括科技板块、医疗健康板块、新能源板块、金融板块等。这些板块的股票通常会受到市场投资者的关注和追捧，因为它们代表了当前市场上的新兴产业和热点领域。

英文：

Thematic sectors refer to investment sectors composed of stocks in the same industry, field or theme. These stocks usually have similar market performance, industry status and profitability, so they are classified into the same thematic sector.

The emergence of thematic sectors is due to the investment preferences and strategies of market investors. Investors usually choose investment targets based on industries, fields or themes, so classifying stocks into different thematic sectors helps investors better grasp market trends and investment opportunities.

Thematic sectors play an important role in investment strategies. Investors can capture market opportunities in a certain field through investment in a thematic sector, while also diversifying investment risks through allocation to different thematic sectors.

Common thematic sectors include technology sectors, healthcare sectors, new energy sectors, financial sectors, etc. The stocks in these sectors usually attract market investors' attention and pursuit because they represent emerging industries and hot spots in the current market.