另外材料的结晶度和熔点有了一定程度的提高.Also, the point and the degree of crystallization were increased.乙酰苯胺 、 己二酸和邻苯二甲酸氢钾可以使PVC结晶度增大.Acetanilide and hexane diacid, potassium hydrogen phthalate could improve PVC crystallinity.酯化反应使纤维素的结晶度...
The first plane-loads of food, children's clothing and medical supplies began arriving.首批飞机运送的食物、儿童衣物和药品开始抵达。A technician loads a video tape into one of the machines.一名技师把一盒录影带装进其中一台机器。Having loads of children takes...
大多数身材发育迟缓者都会赶上他们的朋友。Most late developers will catch up with their friends.通常女孩性发育成熟要比男孩早两年。Girls generally reach sexual maturity two years earlier than boys.细胞不断地分裂更新，这是人体发育过程的一部分。Cells divide and renew as part of the hu...