中文：

底部放量是指股票在低位横盘时，突然出现较大的成交量，且股价出现快速拉升的走势。这种走势通常表明主力资金在底部吸筹，是股价上涨的信号。

在股票价格下跌的过程中，尤其是在低位时，成交量会呈现萎缩状态。这是因为下跌过程中卖出的意愿较强，而买进的意愿较弱。但是当股票价格到达低位横盘时，成交量会逐渐放大，这表明有主力资金开始介入，股票价格也可能会出现快速拉升。

底部放量的出现通常伴随着成交量的持续放大和股价的上涨，这是一种强烈的趋势信号。如果这种走势出现在底部区域，则表明主力资金正在积极建仓，是股价上涨的开始。如果这种走势出现在上涨过程中，则表明主力资金正在积极拉升股价，是上涨趋势的延续。

对于投资者来说，底部放量的出现是一种积极的信号。如果这种走势出现在自己关注的股票中，可以积极介入，等待股价上涨。但是需要注意的是，底部放量并不一定代表股价一定会上涨，还需要结合其他技术指标和市场情况进行分析和判断。

英文：

What is the meaning of "bottom volume"?

Bottom volume refers to a situation where a stock experiences a large trading volume and rapid price increase during the low-level trading range. This kind of market movement usually indicates that major market players are actively buying and is a positive signal for the stock's price to rise.

During the process of stock price decline, especially at low levels, trading volume will usually shrink as selling意愿is strong while buying意愿is weak. However, when the stock price reaches the low-level trading range, trading volume will gradually increase, indicating that major players have begun to intervene and the stock price may also experience a rapid rise.

The emergence of bottom volume is usually accompanied by continuous increase in trading volume and stock price rise, which is a strong trend signal. If this kind of market movement appears in the bottom area, it indicates that major players are actively building positions, making it the beginning of the stock price rising. If this kind of market movement appears during the rising process, it indicates that major players are actively lifting the stock price, continuing the upward trend.

For investors, the emergence of bottom volume is a positive signal. If this kind of market movement appears in stocks that they are watching, they can actively participate and wait for the stock price to rise. However, it should be noted that bottom volume does not necessarily mean that the stock price will rise indefinitely. It also needs to be analyzed and judged in combination with other technical indicators and market situations.