| 21. | As neutrons pass through matter, they make occasional elastic collisions with nuclei. |
| 当中子穿过物质时，偶而与核发生弹性碰撞。
|
| 22. | She fusses too much about his occasional absence. |
| 她对他的偶尔缺席过于大惊小怪。
|
| 23. | He takes an occasional whisky. |
| 他偶尔喝杯威士忌。
|
| 24. | a day of sunshine interspersed with occasional showers |
| 间中有阵雨而充满阳光的一天
|
| 25. | a serious book with an occasional gleam of humour |
| 偶有幽默片段的严肃的书
|
| 26. | occasional music for a royal wedding |
| 皇家婚礼上的应制音乐
|
| 27. | an occasional twinge of rheumatism |
| 一阵突发的风湿痛
|
| 28. | with his plan as an occasional alternative |
| 那是惟一切实可行的办法
|
| 29. | occasional essays |
| 应景文章
|
| 30. | a novel with an occasional gleam of humor |
| 一部不时闪现着幽默的小说
|