今天一早，一枚“德尔塔”Ⅱ型火箭在卡纳维拉尔角发射升空。A Delta II rocket was launched from Cape Canaveral early this morning.他用微型声波发射器开启了门。He activated the door with the miniature sonic transmitter.塞西尔此时开始慌张起来，连忙发射了两枚遇险信号火箭。Cecil now began to pani...
The behavior of convective motion is not laminar but turbulent.对流运动的行为不是片流式而是湍流式.The flow is primarily laminar.这种流动主要是层流.The air flow was regarded as quasi - laminar.空气流动被视为准层流....
Lutein is dihydroxy - carotenoids with the ionone ring systems distributed widely in nature.叶黄素是含紫罗酮环的二 羟基 类胡萝卜素,在自然界广泛存在.Active ingredients: Plant extract, Amino acid, milk powder , carotinoid, lutein etc.主要成分: 植物提取物 、 ...
His speech was punctuated by catcalls.演讲不时给噓声打断。The audience punctuated his speech by outbursts of applause.听众不时以阵阵掌声打断他的讲话.Her speech was punctuated by bursts of applause.她的讲演不时被阵阵掌声打断。a silence punctuated only by the o...