中文：

佣金是指在买卖股票、期货或其他金融产品时，由经纪人或交易所收取的介绍费用或服务费用。简单来说，佣金就是投资者支付给经纪人或交易平台的报酬，以感谢他们提供的服务。

佣金的金额因不同的经纪人、交易平台以及交易品种而异。一般来说，投资者支付的佣金越高，所获得的交易服务也就越好。然而，过高的佣金也会增加投资者的成本，降低其盈利能力。因此，选择合适的经纪人或交易平台，以及制定合理的投资策略是非常重要的。

除了佣金外，投资者还需要考虑其他交易成本，如买卖价差、滑点、手续费等。这些成本都会影响投资者的最终收益，因此在投资前应该仔细评估自己的投资目标和风险承受能力，并选择适合自己的投资策略。

英文：

Commission refers to the introduction fee or service charge charged by a broker or exchange when buying or selling stocks, futures, or other financial products. In short, commission is the remuneration paid by investors to brokers or trading platforms in gratitude for the services they provide.

The amount of commission varies depending on the broker, trading platform, and trading品种. Generally speaking, the higher the commission paid by investors, the better the trading service received. However, too high a commission will increase investors' costs and reduce their profitability. Therefore, it is very important to choose a suitable broker or trading platform and formulate a reasonable investment strategy.

In addition to commission, investors also need to consider other trading costs, such as bid-ask spreads, slippage, handling fees, etc. These costs will affect investors' final returns, so it is important to carefully evaluate one's investment goals and risk tolerance before investing and choose an appropriate investment strategy.