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。

Objective To estimated the relation between the severity of chronic heart failure and change of plasma brain natriuretic peptid (BNP) level.

目的评价血浆脑钠肽(BNP)水平与心力衰竭的相关性,并进一步探讨BNP在诊断及预后方面的临床意义。

Objectives: To investigate the appearance and change of multinucleate cells in the seminiferousepithelium induced by local heating of the rat testis.

研究大鼠睾丸局部热作用后生精上皮多核细胞的出现和变化。

This perturbation of the electronic structure has been known as "pressure-tuning", which can reveal the piezochromism and changes in electronic spectra due to structural distortions.

电子结构的扰动一般被称为“压力调整”，可以用来解释形变产生的压色性。

In the case of invariable of outrigger belt and changing the vertical positional arrangement, the effect on structural inner force, natural vibration period and sidesway were discussed.

分析固定加强层水平伸臂的位置不变，改变环带的竖向位置，研究环带的竖向位置对高层框筒结构力学性能的影响。

Objective To study the accumulation of dry matter and changes of isoimperatorin content and accumulation in the root of Angelica dahurica in different growth and development duration.

摘要目的明确白芷不同生长时期干物质积累及根中异欧前胡素质量分数和积累量变化。

MeHg can easily pass through the placental barrier, accumulate in the fetus and change the behavior and perceptibility of the second generation related to the function of central nervous system.

它极易通过胎盘屏障进入胎儿体内,影响子代的生长发育,改变子代与中枢神经系统功能有关的行为和认知能力。