On these trips he would have a vague plan A, a goal in view, for he had learned to appreciate planning during a wartime spell in the navy; but plans B and C might be good, too.
因为在海军服役的一段战争时期，他学会了重视列计划，所以在这些旅途中他往往会构思出一个模糊的目标“计划A”，此外还有也许是更好的“计划B”和 “计划C”。
We have also learned that the direction of the cross product is given by taking the direction that's perpendicular to a and b.
我们还学过，外积的方向，与A和B均垂直。
A gifted artist in his early 60s, the patient was a liver transplant candidate who learned he had hepatitis B some 20 years earlier.
这位病人是位60出头的杰出艺术家，他20年前就患有病毒型肝炎，曾是肝脏移植候选者。
B: the good news is Chinese men have learned to buy gifts for their girl friends.
B：所幸的是，中国男人也开始为他们的女友买礼物了。
In Chapter 6, you learned about your three options for responding to problems or unmet expectations, and a lot in particular about one of the three options: Plan b.
第六章中，你学了很多解决问题或不能预料情况的三个选择，特别三者之一的：方案B。
He spent a lot of time to prepare the math exam, so when he learned his got only a B, we felt a little disappointed.
他花了许多时间准备数学考试，因此当他获知自己只得了个B时感到有点失望。
From their own experience the sticklebacks had learned that feeder A gave more worms, but by watching, they could see that feeder B was now more plentiful.
九叶穿柳鱼根据自己的经验知道饲料箱A有更多的虫子，但是饲料箱调换了位置之后，它们能发现饲料箱B现在的虫子更多。
From their own experience the sticklebacks had learned that feeder A gave more worms, but by watching, they could see that feeder B was now more plentiful.
九叶穿柳鱼根据自己的经验知道饲料箱A有更多的虫子，但是饲料箱调换了位置之后，它们能发现饲料箱B现在的虫子更多。
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