Economics is precise about the tax that should, in principle, be levied to deal with negative externalities: the tax on a liter of fuel should be equal to the harm caused by using a liter of fuel.
从经济学的角度来看，为了应对负外部性，原则上应该征收的税收是准确的：对一升燃料征收的税应该等于使用一升燃料所造成的危害。
We just harvest them and grow a bunch in a 42-gallon (160-liter) barrel, so we can spray it out in a food-rich environment.
我们只需要收割它们，然后在一42加仑（160升）的桶中种植一大批，这样我们就能把它们洒在一个食物丰富的环境里。
Sadly, the scientists found 1800 pieces of microplastics per liter of (每升) snow.
遗憾的是，科学家们在每升雪里发现1800粒塑料微粒。
So this is moles per liter per second, right? It's disappearance of some concentration for time.
所以这里的单位是摩尔每升每秒，对吗？这代表浓度随着时间的减少。
This is some concentration unit, typically moles per liter.
这是浓度的单位，一般是摩尔每升。
The region's sewage runoff contains more than 14 milligrams of vanilla per liter.
在这一地区的污水中，香草的含量达到了14毫克每升。
And the concentration could be given in moles per liter.
溶液中浓度可以用摩尔每升给出。
摩尔每升每秒。
So we'll multiply by 1000 milliliters per liter.
所以需要乘以1000毫升每升。
Results should not be above 20 micrograms per liter of urine (20ug/L).
测试结果应当不高于20微克/升。
So if it's moles per liter, you usually write that with these brackets here.
如果是摩尔每升，通常写成这里括号的形式。
Average petrol prices ranges from 7.55 to 7.65 yuan per liter in Beijing.
北京汽油的平均价格每公升从7.55元到7.65元不等。
Did we actually use calculators to convert a liter to a gallon or a dollar to a pound?
人们总是使用计算器才能够把升转换为加仑或者把美元转换为英镑？
The 40 liter container under pressure of 150 atmospheres contains 6 cubic meters of helium.
40升的容器在150的大气压下包含6立方米的氦气。
Speaking of Thailand, on the streets all around Chiang Mai there are purified bottle refill stations for big 5 liter water bottles.
说到泰国，在清迈的街道有5升状的水瓶供水的水站。
And we're going to take, usually you take one mole per liter, or one gram per liter, or one whatever.
我们可以，一般用一摩尔每升，或一克每升或其它什么。
If you are thirsty you should know that prices are quite high there, half a liter of beer is approximately 9 euros.
如果你渴了，你应该了解这里东西的价格相当高，半升啤酒约9欧元。
The packaging is the same dimension as a 2 liter milk caron.
这种包装有2升牛奶的容积。
Health risks in children at various blood lead levels, in micrograms per liter.
不同的血铅水准对儿童健康的风险有别，以下数值单位为微克每升。
Or it could be in grams per liter.
或者克每升。
And when the study subjects were getting less than six hours of sleep a night, their ghrelin levels rose from 75 nanograms per liter to 84 ng per liter.
当研究对象睡眠少于6小时，他们的饥饿激素水平从每升75毫微克上升到85毫微克。
Containers must be placed and well-sealed in one transparent plastic bag with a press-seal, of a maximum capacity of one liter (quart).
这些东西必须被密封放置在一个有冲压密封圈的，最大容量为一公升（一夸脱）的透明塑料袋中。
You cannot reasonably tell a child he is allowed only one soda a week if you keep two-liter bottles of Coke and Sprite in the refrigerator.
如果你坚持每星期在冰箱里防止两升瓶装的可口可乐和雪碧，那么你将无法合理地告诉孩子，他每周只能喝一小杯苏打汽水。
We just harvest them and grow a bunch in a 42-gallon [160-liter] barrel so we can spray it out in a food-rich environment.
我们只是把它们收集起来，培养成42加仑(160升)一桶，这样我们就能把它们洒在一个食物丰富的环境里。
Demand is growing: a liter of biodiesel is 4-6 US cents cheaper than diesel.
需求量在节节攀升：一升生物柴油比普通柴油要便宜4 ~6美分。
Instead of Tetra Paks one could buy 3-liter jars with tomato, apple, pear or birch juice.
同利乐包装不同的是，人们可以买到3升装的西红柿，苹果，梨子或是桦树汁罐头。
He charges just 7 pesos (28 cents) for a 1.5-liter bottle, a sixth of what a bottle of state-made cola costs in the supermarket.
一瓶1.5升的饮料他只卖7比索（28美分），这个价格是超市里一瓶国营企业生产的可乐价格的六分之一。
He charges just 7 pesos (28 cents) for a 1.5-liter bottle, a sixth of what a bottle of state-made cola costs in the supermarket.
一瓶1.5升的饮料他只卖7比索（28美分），这个价格是超市里一瓶国营企业生产的可乐价格的六分之一。
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