Winterize head, holding tank and fresh water system by draining or filling with non-toxic anti-freeze.
冬天组长,召开了排

及淡
池或填无毒防冻剂.
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生英语 2023年2月合集
生英语 2019年11月合集 There's even a special drainage system to handle it but Pierre Paulo Capistrani says it was just the second time there's been significant flooding in the main chamber, 10 centimeters there and another meter in the crypt.
有专门的排水系统来处理洪水,但皮埃尔·保罗·卡皮斯特拉尼表示,这
主厅第二次发生严重的洪水,流入大厅的水有十厘米深,流进地下室的水有
米深。
Vanessa
语词汇 So Leptospira is a genus of spiral bacteria known to cause leptospirosis, a zoonotic infection, meaning it can be transmitted from animals such as rodents, to humans; especially people who work in sewers and waters contaminated by these animals' urine.
所以,钩端
旋体
种可导致钩端
旋体
的
旋形细菌种属;钩端
旋体

种人畜共通传染
,即可以从诸如啮齿类动物传染至人类的疾
,特别
在排水系统、或被动物尿液污染的水源区工作的人群更易感染。
The extreme seriousness of desertification results from the vast areas of land and the tremendous numbers of people affected, as well as from the great difficulty of reversing or even slowing the process.
造成土地沙漠化的最后
个主要人为因素在于人类过度灌溉导致土壤的盐碱化。灌溉多余的水渗透到地下水位。假如没有排水系统的存在,那么地下水位上升,把溶解的盐分带到土壤表面。水分蒸发后,盐分留在了表面,形成白色的地壳层,这
地壳层阻止了空气和水接触地底下的土壤。以及扭转甚至减缓这
过程的巨大困难。
文
生英语 2018年9月合集