他发觉对着麦克风他很难专心工作。He found it hard to work with a microphone pointing at him.她专心思考面临的一些实际问题。She kept her mind fixed on the practical problems which faced her.成年人很少会专心地看电视。Adults rarely give the television their undivided a...
The absorption of many molecular layers could be reestablished by rinsing the foils with tap water.多分子层的吸附作用可用自来水淋洗金属箔而重新实现.Carbon stripping foils were prepared by AC or DC arc discharge method.碳剥离膜可用交流电弧法或直流电弧法来制备,也可用交直...