然而,这种情况在20世纪70年代中期,美国开始放松对运输业的管制时开始改变。
This started changing, however, in the mid-1970s, when America began to deregulate its transportation industry.
当你必须用英语说某事时,先问问自己“我知道什么英语单词和短语在这种情况下可以用上?”
When you have to say something in English, think first and ask yourself" What words and phrases do I know in English that I can use in this situation?"
问题在于,这种化合物对大脑有混合作用,这种情况在服用精神药物时并不少见。
The problem is that the compound has mixed effects in the brain, a not unusual occurrence with psychoactive drugs.
Okay? So when you say that what you're doing is scientific in a context of this sort, you are making yourself vulnerable.
对吧?,所以在这种情况下你说自己所做的是科学的时,你就使自己站不住脚了。
As soon as I detect with what we'll call a condition if I'm touching the edge I have to essentially spin around 180 degrees and then continue looping.
一旦我检测到这种情况,当我碰到边界时,我需要转180°然后继续这一循环过程。
Think of anything else with the density goes down when it freezes, and think about where we would be if that wasn't the case.
想想有没有其他的物质,在降温时密度会变大,再想想如果不是这种情况,我们将会怎么样。
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