n.放射性尘埃对海洋地区的污染...

I started work at dawn and returned only at nightfall.我披星戴月地工作。I need to get to Lyon by nightfall.我需要在黄昏前到达里昂。The company was not attempting to run cars after nightfall.公司天黑之后就不再出车....

n.（减少耕种与轮作相结合以控制杂草生长并保持土壤温度的）土地生态休闲法...

landfalls的音标：...

downfallen的音标：downfallen的英式发音音标为：['daʊn'fɔ:lən]downfallen的美式发音音标为：['daʊn'fɔlən]...

waterfall的音标：waterfall的英式发音音标为：['wɔ:təfɔ:l]waterfall的美式发音音标为：['wɔtərfɔl]...

n.（捕猎野兽用的）陷阱( pitfall的名词复数 )，意想不到的困难，易犯的错误...

adv.绝对无误地...

fall by the wayside的音标：fall by the wayside的英式发音音标为：[fɔ:l bai ðə 'weɪˌsaɪd]fall by the wayside的美式发音音标为：[fɔl baɪ ði 'weˌsaɪd]...

Europe gave them away, which allowed polluters to make windfall profits.欧洲无偿发放配额, 结果却让排污企业赚得盆满钵满.Three hours later we are back in the kitchen hulling a heaping buggyload of windfall pecans.三小时后我们回到了厨房，开始给那满满一车风吹自落的山核桃去核。...

falloff的音标：falloff的英式发音音标为：['fɒlˌɒf]falloff的美式发音音标为：['fɒlˌɒf]...

adj.沮丧的...

n.脚步，脚步声( footfall的名词复数 )...

a recent fall-off in sales近来销售量的减少One slip and you could fall off the building.脚下一滑就可能从建筑物上跌下去.When you are learning to ride a bicycle, you often fall off.初学骑自行车时, 常会从车上掉下来....

Her sunglasses had fallen into the pond.她的太阳镜掉进池塘了。Even sensible Frank had fallen under her spell.甚至连一向理智的弗兰克都被她迷住了。Michelle had fallen asleep with her head against his shoulder...米歇尔睡着了，头靠在他的肩上。The stockholders'con...

n.砍伐树木的人，针排，针板，落体...

As we fall asleep the amplitude of brain waves slowly becomes greater.进入睡眠状态时，我们的脑电波振幅慢慢变大。After changing the bed, I would fall asleep quickly.换了床单，我很快就能睡着。He was wont to fall asleep after supper.他老是吃完晚饭就打盹。...

snowfalls的音标：...

befall的现在进行时为：befalling...

She heard the priest's familiar, flat footfall on the staircase.她听到楼梯上传来牧师那熟悉的单调脚步声。The Rat's light footfall was presently heard approaching over the parched grass.突然干枯的草地上传来了老鼠轻快的脚步声.They sent a lot of policem...

footfalls的音标：...

Specialist subjects are full of pitfalls for the unwary.专业学科充满陷阱，专套粗心大意的人。The pitfalls of working abroad are numerous.到国外工作存在许多陷阱。the potential pitfalls of buying a house购买房屋可能遇到的圈套...

A great disaster is befalling.灾祸临头....

a shortfall in tax revenue税收收入不足There will soon be a shortfall in supply of qualified young people.合格年轻人才的短缺将很快出现.The move is designed to help offset the shortfall in world oil supplies caused by the UN embargo.此举旨在缓解联合国...

footfall的近义词/同义词有：step, gait, tread, stride, footstep, plunk, plod, tramp。n.footfall的近义词（脚步）：step, gait, tread, stride, footstep。footfall的近义词（脚步声）：plunk, plod, tramp。...

I need to get to Lyon by nightfall...我需要在黄昏前到达里昂。I started work at dawn and returned only at nightfall.我披星戴月地工作。I need to get to Lyon by nightfall.我需要在黄昏前到达里昂。They were trying to make New Orleans by nightfall.他们力图在黄昏前赶到新...

The recent rain had churned up the waterfall into a muddy whirlpool.最近的一场雨把瀑布搅成了泥水漩涡。The moon was casting a rainbow through the spray from the waterfall.月亮在瀑布溅起的水雾上照出了一道彩虹。As you descend, suddenly you see at last the hid...

ecofallow的音标：ecofallow的英式发音音标为：['ekəʊfæləʊ]ecofallow的美式发音音标为：[ˌɪkoʊ'fæloʊ]...

休耕制...

fallible的近义词/同义词有：errant, mortal, faulty, imperfect, unreliable, defective。adj.fallible的近义词（可能犯错的）：errant, mortal, faulty, imperfect, unreliable, defective。...