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1、prevention
防止；预防；阻止
These methods prevent pregnancy.
这些方法能防止怀孕。
Further treatment will prevent cancer from developing.
进一步的治疗将阻止癌症恶化。
阻止；制止；阻碍
He said this would prevent companies from creating new jobs.
他说这将使公司无法创造新的工作机会。
Its nationals may be prevented from leaving the country.
其国民可能会被禁止出境。
2、range
（同类事物的）一系列，一连串
A wide range of colours and patterns are available.
各种颜色和样式都有。
The two men discussed a range of issues.
那两个人讨论了一系列问题。
幅度;等级;范围
The average age range is between 35 and 55.
平均年龄在35岁到55岁之间。
properties available in the price range they are looking for.
在他们寻求的价格范围内的房产
最大范围;射程
The 120mm mortar has a range of 18,000 yards.
口径为120毫米的迫击炮的射程是1.8万码。
The trees on the mountains within my range of vision had all been felled.
山上我视野范围内的树木都被砍倒了。
