| 1. | At night he roamed the deserted campus .
夜晚他在杳无人迹的校园里四处徜徉。 |
| 2. | Semitrails and semipaths have analogous definitions .
半迹和半路可类似地定义。 |
| 3. | The recorder trace is a series of inverse peaks .
记录器扫迹是一系列相反的波峰。 |
| 4. | The square was deserted .
广场上杳无人迹。 |
| 5. | The dog catches the scent .
狗闻出臭迹。 |
| 6. | Gasoline is a solvent liquid that removes grease spats .
汽油是一种能脱去油迹的有溶解能力的液体。 |
| 7. | The hot weather of july had crept upon them unawares .
7月的热天气，不知不觉地就蹑迹潜踪，悄然来临。 |
| 8. | A grand and almost untrodden field of inquiry will be opened .
一片广大而尚无人迹的研究领域将被开辟。 |
| 9. | The trace of a product of two factors is independent of their order .
两因子的乘积的迹不依赖于因子的次序。 |
| 10. | One complete circular track appears in the lower part of the photograph .
照片的下部有一个完整的圆形径迹。 |
