If you have been investing in the time that I have asked you to, you will pass handily.
如果这次你在我要求你的时间已经调研过,你会轻松的过的。
And five weeks less one day later I decided you know what this might actually be for me and I switched from pass-fail to letter graded status at that point in time.
而第五周的最后一天,我从上及格-不及格制的课程转为上数字学分制的课程,你们可能知道这对我来说意味着什么。
And he traveled by train. And so to pass the time, he would play solitaire.
他坐火车旅行,为了打发时间,他会玩纸牌。
Here is the pitch in--of--a string an octave higher so you can see it this way. As you probably know, if you take a long string and pluck it, it's going to take that long string a long time to pass that sort of cycle, if you will, just one pass through that cycle.
这也是个音高,一个高八度的音弦,你可以这样这样看 你们可能知道,如果你拨动长弦,长弦要经过很长时间,才能完成一个震动周期,如果你想,可以尝试下
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