关于不同类型水车的相对效率有很多争论。
There was much debate on the relative efficiencies of different types of waterwheels.
烧煤的蒸汽机开始占领市场，于是水车很快就过时了。
The coal-fired steam engine was taking over, and the waterwheel was fast becoming obsolete.
不幸的是，这个早期的工厂遇到了许多可再生能源形态都遇到的问题：韦河的水流不稳定，而水车很快就被蒸汽机取代了。
Unfortunately this early plant experienced the problem common to many forms of renewable energy: the flow in the Wey River was unreliable, and the waterwheel was soon replaced by a steam engine.
1832年，也就是迈克尔·法拉第发现磁场变化会产生电场的那一年，一位年轻的法国工程师为一种新的、效率更高的水车申请了专利。
In 1832, the year of Michael Faraday's discovery that a changing magnetic field produces an electric field, a young French engineer patented a new and more efficient waterwheel.
这20美元只是杯水车薪。
有一个他们休息的吊床，一个跳绳的地方，一个在洒水车里玩耍的地方，还有一个用粉笔写字的地方。
There's a hammock they lounge on, a spot to jump rope, a place to play in the sprinkler, and an area to write with sidewalk chalk.
一天，马良在干旱的地方画了一个水车。
本文对洒水车的管道系统进行了耐久性评估。
The dissertation makes the durability evaluation to the pipeline system of the watering cart.
水推动着水车来回转。
王志们的援手固然重要，但这仅是杯水车薪。
But while such support as Wang Zhi's is vital, it is a drop in the ocean.
他说：“半个百分点只不过是杯水车薪而已。”
"Half a percent is a drop in the ocean to be honest," he said.
一起跑过洒水车。
但这对不断增加的失业人数来说，只是杯水车薪。
But it is a meagre sandbag against the rising waters of unemployment.
因为通常不缺雨水，这里的农民都不预备龙骨水车。
Since usually no shortage of rain, farmers here are not prepared to keel water.
通过金属铰接的软管用来将水从煤水车输送到锅炉。
The metal hinged hose was used to transfer water from a tender to a boiler.
但是，多数石油公司辨称，如此只是杯水车薪而无法稳定产量。
But this, the oil companies argue, is barely enough to keep production stable.
溪流在我们的眼中沿着山谷倾斜而下，为打谷的水车提供了动力。
We'd seen Brooks tumbling down every valley, and here one powered a little wooden threshing wheel.
对那些环保意识比较强的消费者来说，“水车”显然很有吸引力。
For the environmentally conscious consumer, the WaterMill has an obvious appeal.
即使有29个门诊计划中心和32个营养补充计划也只是杯水车薪。
Even with 29 outpatient therapeutic programme centres and 32 supplementary feeding programmes, she admits it's only a pinprick in the sea of need.
不过那儿坐着一只狗，它的眼睛有水车轮那么大。可是你不要去理它。
Here you will find another dog, with eyes as big as mill-wheels; but do not let that trouble you.
紧急事故处理人员花了近1小时搜寻落水车辆，落水点就在坡道尾部。
Emergency responders searched for about an hour before finding the vehicle, submerged at the end of the ramp.
弗恩斯说：“我们设想了种种可能的情况，包括偷窃或抢劫运水车等。”
"We thought of various things such as theft or the hijacking of the truck," said events and marketing manager Linda Ferns.
既便如此，对去年高达337.6太瓦时的总需求来说，这只是杯水车薪。
Even so, it will make only a small contribution to total demand, which last year amounted to 337.6TWh.
当前创造的就业机会也只是杯水车薪，还远远无法达到中产阶级的生活水准。
The few jobs now being created too often pay a pittance, not nearly enough to pry open the doors to a middle-class standard of living.
不过这仍然只是杯水车薪，2008年太阳能仅占美国能源消耗的0.1%。
But that is still a drop in the bucket. Only about one-tenth of 1 percent of the energy consumed in the United States came from solar sources in 2008.
因此，在德里，像特赫里这样的地方，穷人只能在市政的运水车和手动泵处排队。
And so in Delhi, as in Tehri, the poor line up at municipal water tankers and hand pumps.
但这对于不满的购房者要面对的继续增长或永久性财富蒸发的风险仍然杯水车薪。
Still, this does little to protect buyers from the risk of substantial wealth destruction if these price declines are permanent or escalate.
但这对于不满的购房者要面对的继续增长或永久性财富蒸发的风险仍然杯水车薪。
Still, this does little to protect buyers from the risk of substantial wealth destruction if these price declines are permanent or escalate.
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