Unlike the case for energy like you've seen in lots and lots of disciplines, where you can arbitrarily set the zero in a way that makes it convenient for you.
通过无数的练习题,你们已经看到这和能量不同,对于能量我们可以任意确定,能量的零点。
So it's convenient if you wanna check and see when the next bus is coming.
用手机可以查下一趟车什么时候来,非常方便。
For example, if it's more convenient should you change the environment to make the unhealthy food less convenient and make healthy foods more convenient?
举例来说,如果是因为方便,那你改变外部环境,会使得健康食品比垃圾食品更容易获得吗
and it's a really convenient way to keep in touch with them.
这样联系他们真的很方便。
Renting a car is cheaper and more convenient.
租车要便宜得多,也方便得多。
So, yeah. And it's very convenient.
而且也很方便。
Now the people in this poll were asked the same question and here's what they said, so 75% said that one reason is that it's more convenient, it's what people like to eat, it's heavily advertised, it's more affordable, people may not know which foods are healthy.
在这个调查中人们也被问到了这个问题,我们来看看他们的答案,75%的人说选择垃圾食品是因为更方便,合乎口味,广告的大力宣传,更便宜,人们可能并不知道哪些食物才是健康的
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