?
查询技巧:
1、输入单个单词准确查询。
2、使用%模糊查询,匹配任意长度字符:
   %a    以a结尾的单词;
   ab%    以ab开头的单词;
   %ac%    含有ac的单词。
3、使用_模糊查询,匹配单个任意字符:
   _a_    三位且a在中间的单词;
   _ad    三位且ad结尾的单词;
   ac_    三位且ac开头的单词;
   _a    两位且a结尾的单词;
   a_    两位且a开头的单词。
4、带连字符-的单词,需含-字符才能模糊查询,如well-know需输入 well-% 。
5、在手机键盘上,如果g上有%和v上有_,则可长按输入。

become established

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。