The most ancient parts of the continental crust are 4000 million years old.
该大陆地壳最古老的那些部分有40亿年了。
Lowered sea levels exposed the shallow continental shelf beneath the Bering Sea.
下降了的`海平面使白令海底的浅大陆架露了出来。
The quota system was modelled on those operated in America and continental Europe.
配额制是仿照美国和欧洲大陆所施行的那些制度制定出来的。