锑的百分含量由各蓄电池生产厂自己掌握.The percentage of antimony may be left to the battery manufacturer.含锑的铅较化工铅好些,由于它有更好的抗蚀性及强度.Antimonial lead is preferable to chemical lead because of its greater corrosion resistance and strength.一种蓝灰色...
讨论了采用不同的电磁多极场作为动态校正器的可能性.推导了圆形校正透镜、偏转校正场和四极、六极校正场引起的附加象差的公式.The possibility of dynamic aberration correction by using electro - magnetic multipole fields is discussed....
She never abandoned her attempts to plumb my innermost emotions.她从未放弃过探究我内心深处情感的尝试。Is this the first of many questions that will plumb the depths of stupidity?这个之后是不是还有众多如此愚蠢透顶的问题？...learning to wire and plumb the house ...
She is ferreting about among old papers for the letter.她在一堆旧文件里搜寻那封信.I spent the day ferreting ( about ) in the attic ( for old photographs ).我一整天都在阁楼上翻找 ( 旧照片 ).She is ferreting among old papers for the letter.她在一堆旧文件里“...