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| 1. | Successful use of the variation method depends on our ability to make shrewd choice of the trial function |
| 成功地应用变分法取决于对尝试函数作精明选择的能力。 |
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| 2. | On account of the well - known manner in which resistance varies with temperature it is common to use |
| 由于众所周知电阻随温度而变化，所以通常用电阻的变化来表示温度的变化。 |
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| 3. | To secure hand-finished waistbands, tailored buttonhole facings, and bindings use a variation of this |
| 为了使手工整修的腰带、西装纽洞贴边牢固,卷边针法可变化,挑起机缝线迹而不是折边。 |
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| 4. | Some authors use the term "variation" in a technical sense, as implying a modification directly due to |
| 有些学者以为变异这一名词的专门意义，是指那种由生活的物理条件所直接引起的变异。 |
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