【中文版】

换手是指股票、期货等交易中，投资者在买入或卖出股票后，需要将其从一只账户转移到另一只账户。这个过程就是换手。

换手的主要目的是为了实现资金的转移和重新配置。在股票交易中，投资者可以随时买入或卖出股票，但是这些交易的实现需要涉及到资金的转移。因此，当投资者需要将资金从一个账户转移到另一个账户时，就需要进行换手。

换手的过程通常由交易所或券商负责，他们将确保交易的顺利进行，并收取一定的手续费。换手的时间通常很短，因为交易所或券商已经建立了高效的交易系统。

在股票市场中，换手率是一个重要的指标，它表示股票的交易频率和活跃度。一般来说，换手率越高，说明该股票的交易越活跃，也意味着更多的资金在流入或流出该股票。

总的来说，换手是股票、期货等交易中不可或缺的一个环节，它保证了交易的顺利进行，也为投资者提供了更多的选择和机会。

【英文版】

Turnover refers to the transfer of stocks or futures from one account to another after investors buy or sell them in transactions such as stocks, futures, etc. This process is called turnover.

The main purpose of turnover is to achieve the transfer and reconfiguration of funds. In stock trading, investors can buy or sell stocks at any time, but the implementation of these trades involves the transfer of funds. Therefore, when investors need to transfer funds from one account to another, they need to undergo turnover.

The turnover process is usually handled by the exchange or brokerage, who will ensure the smooth progress of the transaction and charge a certain handling fee. The time of turnover is usually very short, because the exchange or brokerage has established an efficient trading system.

In the stock market, the turnover rate is an important indicator, which indicates the frequency and activity of stock trading. Generally speaking, the higher the turnover rate is, the more active the trading of the stock is, which also means more funds are flowing in or out of the stock.

In general, turnover is an essential link in stock, futures and other transactions, which ensures the smooth progress of the transaction and also provides investors with more choices and opportunities.