• 1. let in: 允许进入 | 让 | 放进 | 允许参加
• 2. the let in service: 发球无效 | 发球有效 | 活球期
• 3. let in air: 进气 | 通风 | 使…通风

更多释义

• 1.It depends on how full the class is and how many additional students the professor is willing to let in.
  这取决于课堂有多满，以及教授愿意让多少额外的学生加入。
  dict.yoduao.com
• 2.As a preventative measure, we are told to let in fresh air by opening the windows and not to use the air conditioners.
  作为一项预防措施，我们被告知要打开窗户让新鲜空气进来，而不要使用空调。
  dict.yoduao.com
• 3.Can you see it when I open the shutter to let in the light?
  如果我打开百叶窗，让光线进来，你能看见吗？
  dict.yoduao.com

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