?
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。

dorsal fin

na. 脊鳍

1. The first dorsal fin is black at the front.
第一个(刺背鳍是在前面的黑。
2. The shark's dorsal fin was cut off by the fisherman.
鲨鱼的背鳍被渔夫割了下来。
3. Its sail-like first dorsal fin provides stability while swimming.
帆状的第一背鳍在游动时提供了稳定性。
4. Its dorsal fin was in front of me. I was screaming for help.
它的背鳍就在我的前面,我尖声呼救。
5. His dorsal fin was down and his huge pectorals were spread wide.
它的脊鳍朝下耷拉着,巨大的胸鳍大张着。