这些障碍物对于想要往上游游动的鱼儿来说是致命的。The barriers are lethal to fish trying to swim upstream.他在那里有一栋房子，但在河上游几英里处。He has a house down there but it's miles up river.上游的城市将污水排放到河里。Cities upstream use the river to get rid of sewage....
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....
I think Tessa should plump for Malcolm, her long-suffering admirer.我想特莎应该选择长期默默爱慕她的马尔科姆。Tessa laid out her best dress to wear at the party.苔蔡摆出了她最好的衣服准备在聚会时穿.Tessa clung fast to Tito's arm in satisfied silence.苔莎满足地...
动物被杀后, 肝糖元分解为葡萄糖.After the animal is killed, glycogen falls apart into glucose.按葡萄糖氧化酶法测血糖,按苯酚-硫酸法测肝糖元含量.Blood glucose and liver glycogen were measured by GOD method and phenol _ su....