有关directions的精选大全

directions用什么介词
directions用介词in,indirections中文意思是“向四面八方”Theshockwaveformsaconeofpressurizedairmoleculeswhichmoveoutwardandrearwardinalldirectionsandextendtotheground.冲击波形成了一个由压缩气体分子构成的...
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