He heard the screech of brakes.他听到刺耳的刹车声。The figure gave a screech.那个身影发出一声尖叫。In the distance he hears the screech of a dump truck's brakes.在很远处,他听见了卡车的急刹车声....
Optimal levels of DHA are therefore crucial for pregnant and lactating mothers.DHA的最优量对于怀孕和哺乳期妇女非常重要.We are and fatherless , our mothers are as widows.3我们是无父的孤儿; 我们的母亲好象寡妇.Most mothers are insecure about their performanc...
Aspirin is synthesized through O - acylating reaction from acid and anhydride acid with anhydrous carbonate as catalyst.以水杨酸和乙酸酐为原料,采用无水碳酸钠作为催化剂经O - 酰化反应合成了阿司匹林.In 2002, we develop Photo - catalyst & electronic Ionizer A...
即使是常规检查，兽医的收费也会相当高。Vets' fees can be considerable, even for routine visits.给动物注射是兽医的日常工作.Injecting animals is all in a day's work for a vet.最后, 一岁的车开在前面的兽医的.At last, an old car drove up in front of the vet'...