in.

常见例句

• The wind was whispering in the trees.
  一阵风穿过树林沙沙作响。
• There are 26 letters in the English alphabet.
  英语字母表中有26个字母。
• There is a vein of melancholy in his character.
  他的性格中有少许忧郁的气质。
• There was a long lag in forwarding mail to us.
  转寄给我们的邮件晚了很久才拿到。
• A cloud is a mass of vapor in the sky.
  云是天空中的水汽团。
• A fire was burning in the grate.
  火在壁炉中燃烧着。
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