The ripe wheat undulated in the Breeze like the incoming tide.成熟的小麦象潮水般随风起伏.The resulting waveforms depend upon the amplitudes, wavelengths, and timing of the incoming waves.形成的波的形式取决于到来的各波的振幅 、 波长和同步状况.The incoming powe...
The Marshal stepped over the vacuum-cleaner and stumped out of the room.元帅迈过真空吸尘器，脚步沉重地走出了房间。He could hear the whirr of a vacuum cleaner.他能听到真空吸尘器的嗡嗡声。I went down on one knee to plug in the vacuum cleaner.我单腿跪下插上吸尘器插头....