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| 31. | especially vowels) of relatively short duration (as e.g. the English vowel sounds in `pat', `pet', `pit |
| （语音学）关于讲话的声音（尤其是元音）持续较短时间的（例如英语'pat'，'pet'，'pit'，'pot'，'putt'中的元音）。 |
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| 32. | free surface tunnel |
| 无压坑道 |
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| 33. | adit | tunnel | gallery |
| 平峒| 横坑道 |
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| 34. | exploratory tunnel drilling method |
| 勘探坑道掘进方法 |
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| 35. | The roof of the tunnel was supported by wooden props. |
| 坑道顶用木柱支撑。 |
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| 36. | ventilate the galleries of a coal-mine |
| 使煤矿坑道通风 |
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| 37. | emergency gallery |
| 非常出口坑道 |
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| 38. | horizontal exploratory tunnel supporting |
| 勘探水平坑道支护 |
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| 39. | open pit; opencast pit |
| 露天煤矿 |
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| 40. | consonant)with a puff of breath that is clearly audible before the next sound begins, as in English pit |
| 送气发基辅音在下一个音开始前，清晰地送气发音（辅音，特别是爆破音），如英语中的pit或 |
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