委买和委卖量是指委买量和委卖量，它们是股票交易中的两个重要概念。委买量是指买入订单的总量，而委卖量是指卖出订单的总量。这两个量是衡量市场买卖意愿和力量对比的重要指标。

中文阅读：

在股票交易中，委买量和委卖量的概念非常重要。委买量指的是买入订单的总数，反映的是市场对于股票的需求和购买意愿。通常情况下，委买量越大，说明市场对于该股票的需求越强烈，股价上涨的可能性就越大。投资者可以通过观察委买量的大小，来判断市场对于该股票的追捧程度和未来走势。

而委卖量指的是卖出订单的总数，反映的是市场对于股票的供应和卖出意愿。一般来说，委卖量越大，说明市场对于该股票的供应越充足，股价下跌的可能性就越大。投资者可以通过观察委卖量的大小，来判断市场对于该股票的抛售压力和未来走势。

在实际交易中，投资者需要结合委买量和委卖量的变化，分析市场的买卖力量对比和趋势，做出更加理性的投资决策。同时，还需要关注其他技术指标和市场信息，综合判断股票的走势和风险。

英文阅读：

In stock trading, the concepts of委买量和委卖量are very important.委买量refers to the total number of buy orders, which reflects the market's demand and willingness to purchase a particular stock. Generally, a larger委买 quantity suggests a stronger demand for the stock, increasing the likelihood of a price rise. Investors can use the size of委买量to judge the market's enthusiasm and future trend for a particular stock.

委卖量, on the other hand, refers to the total number of sell orders and reflects the market's supply and willingness to sell a stock. A larger委卖 quantity suggests a more abundant supply of the stock, increasing the likelihood of a price decline. Investors can use the size of委卖量to judge the market's selling pressure and future trend for a particular stock.

In practical trading, investors need to combine the changes in委买量和委卖量to analyze the market's buying and selling forces and trends, making more rational investment decisions. At the same time, investors also need to pay attention to other technical indicators and market information to comprehensively judge a stock's movement and risks.