非语言思维是工程设计中的一个核心机制，它涉及的是感知，是艺术家的惯用手法，而不是科学家。
Nonverbal thinking, a central mechanism in engineering design, involves perceptions, the stock-in-trade of the artist, not the scientist.
友好的劝说是每个推销员的惯用手法。
Friendly persuasion is the stock-in-trade of every salesman.
歌剧的惯用手法比诗歌、绘画、戏剧、或电影中的更明显，但本质上又没什么不同。
S10: The conventions of opera are more evident than those of poetry, painting, drama, or film, but they are not different in kind.
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