Part 13 Ballast handling 1. Scuppers plugged. 2. Open sea suction valve and report. 3. Sea suction valve closed. 4. Ballast pump stopped.

发表于:2018-12-05 / 阅读(81) / 评论(0) 分类 海事英语

This is Scientific American's 60-Second Science, I'm Cynthia Graber. This will just take a minute. Even if you have a light hand with the salt shaker, you probably get lots of sodium in processed or restaurant meals. But sodium can contribute to high

发表于:2018-12-24 / 阅读(59) / 评论(0) 分类 Scientific American(六)月

Sorry,there is not text temporarily, Please help tingroom to look for it! 如果您能找到更好的听力原文,请发贴到 听力原文收集区 ,您将会获得10到30积分的奖励! Thank you!

发表于:2019-01-02 / 阅读(128) / 评论(0) 分类 午后咖啡

A CDC study of 4,000 adults found that more than 90 percent ate more sodium than recommended levels. Even if you have a light hand with the salt shaker, you probably get lots of sodium in processed or restaurant meals. But sodium can contribute to hi

发表于:2019-01-02 / 阅读(79) / 评论(0) 分类 60秒科学

There would soon be an explosion; the kettle would be burst open. It is in this way that boiler explosions are often caused. When there is too much steam in a boiler, and it cannot get out, it presses against the sides of the boiler, until at last th

发表于:2019-02-07 / 阅读(80) / 评论(0) 分类 英国学生科学读本

18 Simple Tips to Avoid Back Pains Whether we are seated or standing up, the back has almost no rest. The postures we adopt to sit or while doing our daily activities are not very often adapted for our back. This constant 'torture' of our back result

发表于:2019-02-13 / 阅读(153) / 评论(0) 分类 阅读空间