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| 51. | "Water hyacinth and other kinds of water weeds cause problems in every part of the world. They stop the flow of rivers, block ponds in irrigation systems, interfere with fishing and spread diseases. " |
| 它们淤塞河道，阻塞灌溉系统中的水塘，妨碍养鱼作业，传播疾 |
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| 52. | The Large Bridge at the world famous strong tide river part-The site scene during construction period of the2 nd Qiantangjiang River Bridge. |
| 世界著名强涌潮河段的首座大桥——钱塘江第二大桥在施工期的场景。 |
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| 53. | The average slope of long reaches of rivers must be constant over periods of a few years or decades. |
| 河道长河段的平均坡降，必须是在若干年或几十年周期中为常数。 |
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| 54. | And suggested the new strategies: desilting at high concantration in vertical and horizontal pipes at the dam area; the silt liquefaction starting of buried seeper penstock at the river reach of Chongqing. |
| 提出了2种新的技术对策:坝区垂直与水平管道高浓度排沙;重庆河段埋管压力渗透液化起动泥沙。 |
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| 55. | Thursday, the leading edge of an 80-kilometer long slick of benzene reached Harbin's municipal water inlets. |
| 星期四，长达80公里的被化学物质苯污染的水流开始进入哈尔滨市供水系统的取水河段。 |
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| 56. | It says more than600 kilometers of the river are in critical condition and almost30 percent of its major tributaries are seriously polluted. |
| 报告说，长江有600多公里长的河段处于危急状态，将近30%支流污染极其严重。 |
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| 57. | The peper analyzed hidden danger of reservoir silting of the Three Gorges Project: upgrading of flood damage at the river reach of Chongqing; the river delta erosion. |
| 分析了三峡工程水库泥沙淤积的2大隐患:重庆河段洪灾升级;河口三角洲蚀退。 |
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| 58. | If all the bends were straightened out, it would reach about one third of the distance from the North Pole to the South Pole. |
| 如果把它所有弯曲的河段全弄直的话，它的长度大约是从北极到南极的1/3。 |
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| -- 来源 -- 英语晨读30分（高三） - 69 Some Famous Rivers |
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| 59. | Effects of maintenance and raise of water level at Yichang Station by river bottom protection and roughness addition method and pool back-fill method in the reach from Yichang to Zhicheng of the Changjiang River are calculated and compared by using a 2-D flow numerical simulation method. |
| 摘要运用二维水流数值模拟方法，计算比较了在宜昌～枝城的长江河段内选取重点控制河段，进行护底加糙及回填深槽对维护并抬高宜昌水位的效果。 |
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| 60. | This is all a would away from the day just over 20 years ago when Gordan Parker, who is the chairman of the company, bought a derelict and silted up dock. |
| 与20多年前刚买下一座淤塞的废弃码头的情况相比，戈登 帕克现在已是一家公司的董事长了，他是今非昔比了。 |
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