在撞击过程中, 动量的变化是突然的,但非瞬时的.In a crash, momentum changes abruptly but not instantaneously.有时,在局部速度中可能出现瞬时脉动.Sometimes temporal fluctuation may take place inthe local velocity.它表示寻常光波前和非常光波前的瞬时轨迹.It represents the instantaneo...
The animals had been fed and stabled.牲畜已经喂好并关进厩里了。Horses and cows were stabled on the lower floor.马和牛关在马厩的底下一层.Soldiers profaned the church when they stabled their horses in it.兵士们把马歇息于教堂中时,即玷污了教堂....
他熟练地左一拐右一拐地绕过深沟，穿过了原野。Expertly he zigzagged his way across the field, avoiding the deeper gullies.在深约0.5英寸，间隔12英寸的条播沟里播种。Sow the seeds in drills about 1/2in. deep and 12in. apart.我们仅能依稀辨出桥下一条杂草丛生的窄沟。Below the bridge we c...
A fan folds.扇子可以折叠起来。Two features of folds in stratified rocks that contain strut members invite special attention.包含在承压岩层内的成层岩石中的褶皱,有两个特点引人特别注意.The surface shows deep rill - like folds.表面有深沟槽 状 起伏褶皱.When not in use it f...
She embroidered on this theme for about ten minutes.她围绕这个主题添枝加叶地说了大约10分钟。They sat talking and necking in the car for another ten minutes.他们在车里又坐了10分钟，边说边搂着亲热。They used to buy ten kilos of beef in one lump.他们过去常买10公斤重的整块牛...