"过去式"是个多义词，它可以指过去式（英语语法）,过去式（歌曲）。
v. didst
n. preterite
misc. past tense
take的过去式是took。
年轻作家使用更多的否定式和过去式词汇，而年长的作家使用更多的肯定式和未来式词汇。
Younger writers use more negative and past-tense words than older writers who use more positive and future-tense words.
如果你考虑到技术变化的预期速度，那么你的技能将变得很多余，或者你的行业会成为过去式。
If you factor in the projected rates of technological change, either your skills will become unnecessary, or your industry outdated.
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