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| 51. | submerged wellhead platform system |
| 沉没式井口平台系统 |
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| 52. | The ship sank beneath the waves. |
| 轮船沉没于波涛下面。 |
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| 53. | submerged wellhead jacket |
| 沉没式井口导管架 |
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| 54. | IceBergs can send Big ships to the Bottom of the sea. |
| 冰山能使巨轮沉没海底。 |
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| 55. | Science is taking us back in time▼ to witness the sinking of the unsinkable Titanic. |
| 科学将带我们回到过去，去目击号称永不沉没的泰坦尼克号的沉没。 |
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| 56. | The Wreck of the Golden Mary |
| 金玛丽号的沉没 |
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| 57. | submersible pump |
| 沉没泵；潜油泵；潜水泵 |
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| 58. | " Heat sink of semiconductor devices--Heat sink, extruded shapes" |
| GB/T7423.2-1987半导体器件散热器型材散热器 |
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| 59. | Icebergs can send big ship to the bottom of the sea. |
| 冰山能使巨轮沉没海底 |
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| 60. | sink a piling. |
| 把木桩砸入地面 |
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