?
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。

keep hold of

na. 抓住不放;握紧

1. She tried to keep hold of the child's hand.
她尽力拉住那孩子的手不放。
2. They put us under pressure and it was very hard for us to keep hold of our lead.
她们给我们施加了很大压力,我们很艰难地保持着领先。
3. I think we should have shut up shop after the third goal and keep hold of the ball more.
我想我们应该在进第三个球后少射门,要多控制球。
4. I am a very happy person and I am going to try and work hard to keep hold of the feeling I have at the moment.
我是个快乐的人,我也会努力做得很好并保持住此时这种幸福感。
5. You want to keep hold of as many visitors as possible so get them to subscribe to your email list or blog feed!
你想放置的尽可能多的游客,以便让他们订阅你的电子邮件列表或博客饲料!