be optional

是可选的

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Used to state that something is not required or mandatory.

用于说明某事物不是必需的或强制性的。

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例句 (10)

be optional = 是可选的 (用于说明某事物不是必需的或强制性的。)

  • The extra language classes are entirely optional.额外的语言课程完全可选的
  • Participation in the workshop is optional for all staff members.所有员工参加研讨会可选的
  • Wearing a tie will be optional at the casual Friday event.在休闲周五活动中,打领带将是可选的
  • For this project, the research paper is optional, but highly recommended.对于这个项目,研究论文可选的,但强烈推荐。
  • The attendance for the evening lecture was optional, so many people left early.晚间讲座的出席可选的,所以很多人提前离开了。
  • You can choose whether to attend; your presence is completely optional.你可以选择是否参加;你的出席完全可选的
  • In some advanced courses, the final exam can be optional if you have a high average.在一些高级课程中,如果你平均分很高,期末考试可以是可选的
  • Adding extra cheese to your pizza is always optional.给披萨加额外的芝士总是可选的
  • The extended warranty is optional and comes with an additional cost.延长保修可选的,并需要额外费用。
  • Whether you contribute to the group discussion is optional, but encouraged.你是否参与小组讨论可选的,但鼓励。