;I heard police sirens in the distance .
我听到警笛
从远处传来。
I heard police sirens in the distance .
我听到警笛从远处传来。
The sirens are calling the men to assemble.
警报在召令士兵集合。
I heard the wail of a police siren.
我听见警笛的尖叫。
In big cities you always hear sirens all the time.
在大城市里, 
听到警笛。
The cars had stopped at the sound of the approaching siren.
这些汽车听到愈来愈近的警笛便停了下来。
When he heard the police sirens, he ran off as fast as his legs could carry him.
听到警笛响起，他拚命地跑。
The sirens are also found on mirror stands for women to remind them that their beauty and powers of irresistibility are of voice and words as well as appearance.
">子中像塞壬一样的妖娆女人是女人为了提醒他们，女人令人无法抗拒的美丽与力量来自于她们的音，她们的语言以及她们的美貌。
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