If the note of D is sounded on a harp, all the corresponding D strings of other octaves will likewise resonate.如果用竖琴演奏D音符，其他八度音阶所有相应的D弦都将发出共鸣。The other circuit is designed to resonate close to the desired frequency.把另一线圈...
他与朋友合伙经商.He associated himself with his friend in a business undertaking.经商成功不一定赚钱.Business success does not automatically lead to financial success.为了帮助兄弟经商,他放弃休假.He sacrificed his holiday to help his brother's bus...
to weld a broken axle焊接一条断裂的轴Where did you learn to weld?你在哪儿学会的焊接技术？They will also be used on factory floors to weld things together.它们也可用于工厂车间，用来焊接物体。...
The forebody design a key issue for hypersonic airbreathing vehicle.前体设计是吸气式高超声速飞行器设计的关键之一.It would reach hypersonic speeds -- five times the speed of sound.也就是说,要使飞机达到特超音速—即音速的五倍.hypersonic aerodynamics高超音速空气动力学rarefied...
其未得之也, 患得之; 既得之, 患失之.While they have not got their aims , their anxiety is how to get them ; when they have got them, their anxiety is lest they should lose them.凡真正渴求知识者,每能得之,这是知识的特性.It is the peculiarity of knowledge t...