A bright shooting star, or meteor, is an unforgettable sight.明亮的流星，或者说陨石，是番难忘的景象。Like a flash of lightning, the meteor shot across the sky.流星像一道闪光划过天空.It was made by a meteor that fell from space.它是由流星从太空中坠落造成的....
这就像是一种化学试剂.It is like a chemical reagent.这种双用试剂把蛋白质分子彼此连接起来.This bifunctional reagent links protein molecules to one another.碳容易被亲核试剂进攻.The carbon should be susceptible to attack by a nucleophilic species....
Reasons of forming first cracks were foundry lacuna, impurity gathering , lard exiting.铸造缺陷 、 杂质元素偏聚和夹杂物的存在是形成早期裂纹源的原因.There was so much very deep lacuna in his crude big hands.粗糙的大手上一道道很深的裂口.Objective To investigate the...
Birmingham's International Convention Centre is the venue for a three-day arts festival...为期3天的艺术节在伯明翰的国际会议中心举办。He told them that no venue had yet been definitely decided.他告诉他们还没有确定下场地。The hallowed turf of Twickenha...