Natural soil fertility is dropping in many areas because of continuous industrial fertiliser and pesticide use, while the growth of algae is increasing in lakes because of the fertiliser run-off.
在很多地区，由于工业化肥和农药的持续使用，导致自然土壤的肥力正在下降，然而化肥的流入却导致湖泊中藻类生长得越来越快。
Dropping off the dog will take us several hours off the planned route, so we review our day's schedule with this adjustment in mind.
送走小狗会花去我们若干小时，这使我们偏离所计划的路线，因此我们在心中审视我们一日的安排，并进行相应的调整。
Someone keeps dropping off and coming back on but no one knows who.
有人半途掉线，又半途进来，但是谁也不知道是谁。
In fact, it's generally known that when people engage in any activity requiring concentrated effort, performance starts dropping off after 60-90 minutes.
实际上，根据我们的常识，当人们从事注意力高度集中的活动时，性能状态在60- 90分钟之后就会降低了。
Because they were so sensitive to deadly gases such as methane and carbon monoxide, a canary dropping off its perch was a highly visible signal to the miners that it was time to leave.
因为它们对于甲烷和一氧化碳等致命毒气非常敏感，从栖木上掉下来的金丝雀是一个明显的信号，告诉矿工是时候离开了。
It arrived on plastic plates with the meat dropping off the bone by the handful.
放在塑料盘子里上桌时，大把的鱼肉从鱼骨上脱离开来。
Water prevents the needles from drying and dropping off and maintains the fragrance.
水能使松针保持色泽和柔韧，阻止松针大量脱落。
He made good time, and after dropping off his daughter, Shamrim, Abraham and his son, Walentin, had a moment to spare.
由于车开得快，在把女儿莎姆丽姆送到学校后，亚伯拉罕和儿子威伦廷还有点儿空闲时间在一起。
Saving the world, helping startups — and dropping kids off at school.
拯救世界，协助创业——以及送孩子上学。
Payments to pensioners will continue to rise (see chart), before dropping off after 2035.
但是退休人员的养老金将会持续增加，直到2035年才会下降。
The lobby was full, mostly with people dropping off various animals that they no longer wanted.
大厅里挤满了人，大部分人来丢弃他们不要的宠物。
As this force gets more attention, another is dropping off the list: social class.
这个力量越受重视，社会阶层就渐渐被忽略了。
Her daughter used to be in day care or preschool from 7 a.m. to 6 p.m., but Mrs. Salinas began dropping her off later and picking her up earlier.
女儿从早上7点到下午6点都在幼儿园，但不久前，萨利娜忽然很晚才送孩子入园，很早就去接她回家。
Get on the dance floor and show off your jaw-dropping dance moves.
进入舞池并且秀出你令人惊叹的舞技。
As I was just dropping off, I heard a loud banging noise.I told myself it was just the neighbors and to stop making myself paranoid.
我刚要睡著，突然听到砰砰的巨响，我心想可能是邻居，告诉自己不要乱想。
They also had trouble speaking—dropping some sounds off the beginning of words, for example, so that they would say “able” when they meant “table.
他们在表达上也有问题，常常丢掉一些词汇开头的音素，例如他们会说“能（able）”，但实际上想说的是“桌子（table）”。
He and his wife were busy Saturday, dropping off their only child, Allie, at Earlham College in Richmond, Ind., to begin her freshman year.
因为他和妻子在周六忙着送他们的独生女allie去里奇蒙的厄勒姆学院，开始她的大一新学年。
Repeat each day, dropping off the oldest true range.
每天重复，去掉最老的那个真实振幅。
Saless have been dropping off badly.
销售量一直减少得很厉害。
Dropping off infantry has a more tactical role since it is more about unit insertion than transporting Armor.
空投步兵更多的是起到战术作用，因为比起运送装甲来，他更多的是单位的穿插。
They are looking for anybody who saw something in this area that would directly relate to the dropping off of a package.
他们正在寻找看到这个区域一些东西的人，嫌疑人将直接关联到放下一个包裹。
After dropping off Cammie and Mack with a neighbor, Mike raced his car along 1604 toward the hospital.
在把开米和麦克安顿给邻居炤看后，迈克开著车沿著1604号公路开往医院。
For it turns out the most effective shopping sprees are the snappiest ones – with our ability to spot a bargain dropping off significantly after less than half an hour.
研究证明，在购物狂潮中动作最快的人才是最会买东西的人。——我们讨价还价的能力在不到半小时的时间内就会明显降低。
The Boston Police division that regulates taxis says Cohen faces suspension for violating rules requiring drivers to inspect their cabs for forgotten items after dropping off a fare.
管理计程车的波士顿警察分局说，柯恩因为违反规定而面临停业；依规定，计程车司机要在送乘客下车后，检查车内是否有遗忘的物品。
However, lost robots leave a robot "scent" that prohibits future robots from dropping off the world at the same grid point.
然而，损失的机器人会留下一些“信息素”，以免后来的机器人再从同一格坠落。
Forget counting sheep, next time you are having trouble dropping off to sleep try putting on a jazz CD.
把数羊入睡的办法忘了吧，下次如果你再睡不着的话，试着放一张爵士乐的CD听听。
A GWEN station transmits circularly up to 300 miles, the signal dropping off sharply with distance.
一个GWEN基站螺旋式传输多达300英里，信号强度随着距离的增加而急剧下降。
Expect the swell to peak by Saturday and start dropping off by late Sunday.
期待这周六的大浪慢慢地越来越小到周日的时候。
Expect the swell to peak by Saturday and start dropping off by late Sunday.
期待这周六的大浪慢慢地越来越小到周日的时候。
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