He jacked the car and changed the back tyre.

他用千斤顶把车顶起来更换后胎。

The tire was whipped off and changed in jig time.

轮胎拆下后马上装上新的。

I wish he’d make up his mind—I’m tired of all this chopping and changing.

我希望他能打定主意，我厌倦了他的变化无常。

You shouldn't keep chopping and changing like this; you'd better make up your mind right now!

"你不能再这样变化无常了,最好现在就拿定主意!"

Engaging and original, this book offers a pathbreaking new account of language acquisition, varia- tion and change.

极具权威性和原始性，这本书独辟蹊径地提供了语言获得、变异和改变的新途径。

There are lots of factors causing infestation of phytophagous pests and changes of dominate species in the apple orchards.

摘要苹果园内植食性昆虫种群数量的上升和主要种类的变替，原因是多方面的。

PA has the good anti-homoiothermy, anti-weary and changes the strength, the anticreep, and the good wearability, bears the chemical agent.

PA具有良好的抗恒温性、抗疲劳和应力、抗蠕变性、及较佳的耐磨损性、耐化学剂性。

Objective To explore the correlation between the epilepsy induced by interleukin-2 (IL-2) and changes of NMDA receptor(NMDAR) and estrogen receptor(ER).

摘要 目的 探讨白细胞介素2(IL-2)致痫与NMDA受体(NMDAR)和雌激素受体(ER)的关系。

Preeclampsia-eclampsia is caused by generalized vasospasm, activation of the coagulation system, and changes in autoregulatory systems related to blood pressure control.

先兆子痫-子痫是因全身的血管痉挛，凝血系统激活，血压控制的自身调节系统改变而引起。

Nephrotoxic serum nephritis model of rat was cre ated by Clarke s method, and changes in ultrastructure of kidney were examined.

采用大鼠肾毒血清性肾炎模型,常规电镜制片、染色,观察肾组织超微结构的变化。