中文：

60日均线通常被称为“生命线”或“决策线”。这是因为60日均线在股票交易中具有重要的意义，它反映了股票价格的中长期趋势。当股票价格跌破60日均线时，这通常被视为一个不利的信号，意味着股票的下跌趋势可能正在加强。相反，如果股票价格突破60日均线，这通常被视为一个积极的信号，表明股票的上涨趋势可能正在加强。

因此，许多投资者将60日均线作为买卖股票的重要参考依据。他们可能会在股票价格跌破60日均线时卖出，或在股票价格突破60日均线时买入。

英文：

The 60-day moving average line is often referred to as the "lifeline" or "decision line." This is because the 60-day moving average line holds significant meaning in stock trading, reflecting the medium to long-term trend of stock prices. When the stock price breaks below the 60-day moving average line, it is typically viewed as an unfavorable signal, indicating that the stock's downward trend may be strengthening. Conversely, if the stock price breaks above the 60-day moving average line, it is typically viewed as a positive signal, indicating that the stock's upward trend may be strengthening.

Therefore, many investors use the 60-day moving average line as an important reference for buying and selling stocks. They may sell when the stock price breaks below the 60-day moving average line or buy when the stock price breaks above it.