?
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。

under attack
高中

adv. 遭到攻击

1. The patrol came under attack from all sides.
巡逻队受到四面八方的攻击。
2. The army has come under attack by separatists.
军队遭到独立分子的袭击。
3. The school has come under attack for failing to encourage bright pupils.
这所学校因未能鼓励聪明学生而受到非难。
4. Robots continue to have an impact on blue-collar jobs, and white-collar jobs are under attack by microprocessors.
机器人继续影响蓝领工作,而白领工作正受到微处理器的攻击。
5. Government should attach great importance to cyber security which is constantly under attack and is of great importance to national security.
政府应该十分重视网络安全,它不断地受到攻击,却又对于国家安全十分重要。