He was waving his arms to draw their attention.他正挥手以引起他们的注意。The small British crowd roared themselves hoarse, waving their Union Jacks.一小群英国人挥舞着国旗，吼得嗓子都沙哑了。The windows overlooked a lawn of tall waving grass.窗户外边是一块草地，高高的...
A change in enthalpy also takes place when a change of phase occurs.相发生变化时,焓也发生变化.Curing shrinkage, temperature and curing enthalpy of benzoxazine based on diphenyl oxide resin were investigated.研究了苯并口恶嗪二苯醚树脂固化时的体积收缩率 、 ...