1. Certain institutional and practical norms had become established as well. 一些体制和实际的准则也被建立起来了。
2. Pests often target specific tree species and, if they become established, they usually remain as permanent components of the ecosystem. 害虫通常以特定的树种为目标,一旦形成,它们通常会成为生态系统的永久组成部分。
3. Aedes albopictus has become established in the United States. 白纹伊蚊已在美国扎下了根。
4. How long did it take you to become established in the office? 你用了多长时间才在这个办公室站住了脚?
5. So having once become established in a routine, we keep going, like a tramcar along its rails. 所以,当我们一旦陷入既定的惯例,就会像有轨电车一样,沿着自己的轨道不停前进。