水的化学分子式是H2O.The chemical formula for water is H 2 O.测得的准确分子量与具体的分子式完全吻合.The precise molecular weight that is measured can be uniquely associated with a specific moleculer formular.仅从分子式, 我们就能推断分子中的 “ 不饱和度 ”.From the mo...
They went forward as briskly as they could on the uneven causeway.他们用尽可能快的速度,在高低不平的堤上继续前进.She set the brasses jingling as she raised herself briskly, an elbow on the pillow.她用一只胳膊肘支在枕头上,敏捷地坐起来时,震得黄铜环叮零当啷响.He walks briskl...
突然的拉力使得整只船剧烈颤动。The whole ship shuddered and trembled at the sudden strain.突然的噪声把鸟群惊飞了.The sudden noise frightened the birds to take wing.一阵突然的痉挛使他全身发抖, 摔倒在地上.A sudden convulsion shook him, and he fell to the ground....
In the distance I could hear the chug of farm machinery.离老远，我都能听到农机具的突突声。Busy boasts chug and scurry about the river - racy speed boat, stolid, snorting tugs.繁忙的船只在河上鸣叫着来来往往 - --高速快艇和笨头笨脑喘着气的拖驳.Chug Chug Chug , Toot Toot...