51. | There is often a deposit of sand and mud at the mouth of a river. |
| 河口常有泥沙沉积。
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52. | The river deposited silt at its mouth . |
| 河口沉积了淤泥。
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53. | The Nile divides at its mouth and forms a delta. |
| 尼罗河在河口处分岔,形成了一个三角洲。
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54. | he likes to shoot off his mouth about what a great guy he is. |
| 他喜欢吹牛说他是如何了不起。
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55. | My tongue cleaves [sticks] to my mouth . |
| 我张口结舌。
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56. | Never pick your teeth without holding your hand before your mouth . |
| 剔牙时千万要用手遮在嘴前。
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57. | Put a handkerchief over your mouth when you sneeze. |
| 打喷嚏时用手帕捂住嘴。
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58. | Having another mouth to feed would be a great hardship. |
| 再添一张嘴吃饭将成为一大困难。
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59. | The noise brought her heart up into her mouth . |
| 这响声使她吓得要命。
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60. | Even though the car they gave you is an old jalopy .you shouldn't look a gift horse in the mouth . |
| 他们送给你的即使是非曲直辆破旧汽车,你也不应挑剔。
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