What keeps this vast system clean is a web of earth, plants and animals; when water cannot be in touch with these it is no longer a sustainable and healthy system.
而能保持这一庞大水系统洁净的则是由泥土、植物、动物组成的网络。当水不接触它们时，这个系统就不能再保持正常了。
He hastens to add that individual actions cannot be a substitute for the policy changes needed to curb emissions and promote clean energy.
他接着补充，个人的行动并不能取代政策的改变，而这些政策能促进温室气体排放的减少和清洁能源的开发。
Fresh bread can be kept in a clean tin container. Be sure dust and insects cannot get to the bread.
新鲜面包可贮存在马口铁罐中，确保灰尘和昆虫无法进入。
Clean Disk Security gives you secure file deletion, ensuring that deleted files cannot be undeleted again.
清洁磁盘安全让您安全的文件删除，以确保被删除的文件无法再被还原。
Increase gradually as dimensions of inn of net of the merchant that clean out treasure, singles fights a lot of merchant to already cannot be answered alone trade everyday.
随着淘宝店主网店规模逐渐增大，许多店主单打独斗已无法应对每天交易。
In case the mold cannot be installed from the machine top because of the height limit of the clean room, a higher mold can be assembled and disassembled by the bottom upward way easily.
当由于洁净室高度的限制，使得模具无法从上方安装时，从下往上的安装方式可以实现更高的模具的拆装，不影响生产。
Mould release agents cannot be used in the fabrication of this part because it must undergo another bonding phase which requires a clean application surface.
为了防止给下面的工序造成污染，因此不能使用脱模剂。
Other public lands cannot be effectively used for their intended purposes without clean air and good visibility.
如果缺乏干净的空气和良好的明视度，其他公共土地也就不可能更好地利用。
After each screening, you should wipe clean the residual dust in screen plate on the body, forbidden dish washing percussion and placed order cannot be reversed.
每次筛分使用后，应揩净机体上的筛盘内的残余灰尘，严禁水洗敲击，安放顺序不能颠倒。
The tube connector and "O" shape seal ring of the valve must be kept clean, and the cross section line of the tube connector cannot be painted.
联接管与阀口“O”形密封圈套入处应保持清洁， （见图20） 联接管有剖面线的部位处不能涂油漆。
The operating environment should be clean, the corrosive gas is not allowed, and it cannot contact water and vapor directly.
仪表的使用环境应保持洁洁净，不得有腐蚀性气体，不能直接接触水和蒸汽。
The operating environment should be clean, the corrosive gas is not allowed, and it cannot contact water and vapor directly.
仪表的使用环境应保持洁洁净，不得有腐蚀性气体，不能直接接触水和蒸汽。
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