中文：

绩优股是指业绩优良且稳定的公司股票。通常这些公司具有较高的每股收益、净资产收益率和现金流量，并且能够持续稳定地增长。绩优股一般具有较高的投资回报率和较低的风险，因此受到投资者的青睐。

绩优股的选择通常基于公司的基本面指标，如财务状况、业务模式、管理团队、市场前景等。投资者可以通过研究公司的财务报表、行业趋势和市场竞争状况等因素来评估一只股票是否为绩优股。

绩优股的投资价值在于其稳定的盈利能力和增长潜力。由于绩优股的业绩表现较为可靠，投资者可以相对较有信心地持有这些股票，并且可以在长期持有过程中获得稳定的收益。

需要注意的是，绩优股并不一定意味着没有风险。市场波动、经济环境变化等因素都可能对股票价格产生影响。因此，投资者在选择绩优股时也需要进行风险评估和投资规划，以更好地把握市场机会和控制投资风险。

英文：

Performance stocks refer to high-quality and stable company stocks. Typically, these companies have high earnings per share, high net asset returns, and good cash flow, and can grow continuously and stably. Performance stocks generally have high investment returns and low risks, so they are favored by investors.

The selection of performance stocks is usually based on company fundamentals, such as financial status, business model, management team, market prospects, etc. Investors can evaluate whether a stock is a performance stock by studying the company's financial statements, industry trends, market competition and other factors.

The investment value of performance stocks lies in their stable profitability and growth potential. Due to the reliable performance of performance stocks, investors can relatively confidently hold these stocks and obtain stable returns in the long term.

It should be noted that performance stocks do not necessarily mean no risks. Market fluctuations, changes in the economic environment and other factors may affect stock prices. Therefore, when selecting performance stocks, investors also need to carry out risk evaluation and investment planning to better seize market opportunities and control investment risks.