由……组成 英语怎么说 (2种说法)
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由……组成 英语怎么说 (2种说法)
make up of
eg.We think of a nucleus as make up of neutron and proton.
be composed of
eg.Concrete is composed of cement,sand and gravel mixed with water.
eg.We think of a nucleus as make up of neutron and proton.
be composed of
eg.Concrete is composed of cement,sand and gravel mixed with water.