Atleastayear'spreparatoryworkwillbenecessarybeforebuildingcanstart.在开始动工之前至少要做一年的准备工作固定搭配①preparatorytodoingsth在…之前；为…做准备【to为介词标志】Tomclearedhisthro...
形容词：preparatory：预备的；准备的；筹备的Atleastayear'spreparatoryworkwillbenecessarybeforebuildingcanstart.在开始动工之前至少要做一年的准备工作固定搭配①preparatorytodoingsth在…之前；为...
形容词：preparatory：预备的；准备的；筹备的Atleastayear'spreparatoryworkwillbenecessarybeforebuildingcanstart.在开始动工之前至少要做一年的准备工作固定搭配①preparatorytodoingsth在…之前；为...