中文：

换手率是指一定时期内股票的交易频率，通常以百分比形式表示。它反映了市场上投资者对于该股票的活跃程度和交易量。一般来说，换手率越高，表明投资者对于该股票的关注度和交易量越大，反之则越小。

换手率的计算公式为：换手率=某一段时期内的成交量/总股本×100%。例如，如果某股票在一个月内的成交量为100万股，总股本为1亿股，则该股票在这个月的换手率为1%。

换手率对于投资者来说具有重要的参考价值。高换手率可能意味着投资者对于该股票的关注度较高，交易较为活跃，此时进行短线投资可能会获得较好的收益。而低换手率则可能意味着投资者对于该股票的关注度较低，交易较为冷清，此时进行长线投资可能会有较好的机会。

英文：

The turnover rate refers to the trading frequency of stocks within a certain period, usually expressed as a percentage. It reflects the activity and trading volume of investors in the market for that stock. Generally speaking, the higher the turnover rate, the greater the investor attention and trading volume on that stock, and vice versa.

The calculation formula for the turnover rate is: turnover rate = volume in a certain period / total share capital × 100%. For example, if a stock has a trading volume of 1 million shares in one month and a total share capital of 100 million shares, the turnover rate for that stock in that month is 1%.

The turnover rate has important reference value for investors. A high turnover rate may mean that investors have high attention and active trading on that stock, and short-term investment may yield good returns. While a low turnover rate may mean that investors have low attention and inactive trading on that stock, long-term investment may have better opportunities at this time.