"Do you know what the best birth1 control2 in the world is?"
"No."
"That's right."
点击  收听单词发音
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1
birth
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| n.出身，血统，出生，诞生，出现，起源 |
参考例句： |
- She gave birth to a fine healthy baby.她生了一个健康可爱的婴儿。
- She supports birth control.她赞成计划生育。
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2
control
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| n.控制，管理，克制，控制器，调节装置；vt.控制，操纵，抑制 |
参考例句： |
- He lost control of his bicycle and fell down.他因控制不住他的自行车而跌倒了。
- That child is impossible to control.那孩子很难管。
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