乘船航行不能直接进入风；试图这样做是所谓的变幅。
A boat cannot sail directly into the wind; attempting to do so is called luffing.
船的航行不能只靠一个舵手，人生也不能仅存唯一的希望。
A ship should not ride on a single anchor, nor life on a single hope.
船只可能会因其重量在尾部而变得不平衡，可能会在水里“蹲下”而不能正常航行。
The boat may be imbalanced by having that weight far astern and may "squat" in the water and not sail as well.
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