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词汇
primary filter
例句
Ozone is the earth's
primary filter
for ultraviolet radiation.
臭氧层是地球上阻挡紫外线辐射的主要屏障。
随便看
backlog of cases
backlog of orders
back matter
back money
back muscles
back number
back of
back of beyond
back off
back-office
back office
back of the book
back of the neck
back on
back on to
back order
back-ordered
back out
back out of
backpack
back pack
backpacked
backpacker
backpackers
backpacking
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更新时间:2024/12/22 21:46:37