post-signal

常见例句

• Special Design of Block Post Signal
  线路所信号特殊设计
• I am afraid the last post has been dispatched.
  恐怕末班邮件已经发出了。
• A red light is usually a signal of danger.
  红灯通常是危险的信号。
• All bookings must be made by post.
  所有预约都必须用信函形式。
• By parcel post our samples were sent.
  我们的样品是通过邮包寄送的。
• No one can alter the fact, ex post facto.
  没有人能在事后改变事实本身。
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