例句： Certain of those present were unwilling to discuss the matter further. 某些在场的'人不愿意进一步讨论这个问题。 Those beliefs still prevail among certain social groups. 这些信念在某些社会群体中仍很盛行。 The work must be completed within a certain time limit. 这项工作必须在一定期限内完成。 The company's financial position is not certain. 这家公司的财务状况不明朗。 Many animals breed only at certain times of the year. 很多动物只在一年的某个时候繁殖。 上一篇：maybe和may的区别用法 下一篇：some of them后加什么形式 |