如果你挠他的下巴，他的耳朵就会摆动。His ears wiggled if you scratched his chin.挡风玻璃上的雨刮“啪嗒啪嗒”地来回摆动。The windscreen wipers thudded back and forth.别靠近它摆动的尾巴。Don't go near that lashing tail....
德娜买了几卷看起来非常次的丝绸。Dena bought rolls of silk that seemed ridiculously cheap.她的丝绸连衣裙是天蓝色的，和她眼睛的颜色一样。Her silk dress was sky-blue, the colour of her eyes.丝绸和羊毛之类的纯天然织物比合成纤维的保暖性更好。Natural fabrics like silk and wool are better i...
In Europe, AC is usually generated at 50 Hz.欧洲的交流电输出频率通常为50赫兹。A measure of sound intensity equivalent to one decibel at 1000 Hz.一种声强的量度单位,其值等价于1000Hz1分贝.The frame rate is then 60 Hz.这时,帧速率为60赫....