雨林有自己完善的系统来确保自身的生存；高大的树木有枝叶形成的树冠层来保护自身，树冠也保护着矮小的植物以及动物不受暴雨、酷暑及强风的侵扰。
Rainforests have their own perfect system for ensuring their own survival; the tall trees make a canopy of branches and leaves which protect themselves, smaller plants, and the forest animals from heavy rain, intense dry heat from the sun and strong winds.
为了访问Rational Team Concert之类变更管理系统中受保护的数据，通过重复使用已存在的标准您必须能够完善用户名字和密码。
To access protected data in a change management system such as Rational Team Concert, you typically must furnish a user name and password.
保护生态环境，完善污水和固体垃圾处理系统建设。
To protect the ecological environment and to improve the efficiency of sewage and solid waste treatment system.
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