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41. | Shusheng sat on the steps. |
| 水生坐在台阶上说: |
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42. | Mind the gap |
| 小心台阶间跨度 |
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43. | terraced substrate laser |
| 台阶式衬底激光器 |
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44. | heading-and-bench method |
| 正台阶采矿法 |
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45. | nominal midstep value |
| 标称台阶中心值 |
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46. | Mind the step outside the door. |
| 小心门外的台阶。 |
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47. | Mind the steps! |
| 注意台阶!小心脚下! |
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48. | overhand planing |
| 倒台阶式刨削 |
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49. | step profile of invasion |
| 台阶型侵入剖面 |
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50. | The minister went up the steps. |
| 牧师一步步走上台阶。 |
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