?
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。

underside

英 / ˈʌndəsaɪd /
美 / ˈʌndərsaɪd /
n. 底面;下侧;底部;下表面

复数:undersides

1. The laser at photovoltaic cells mounted on the pelican's underside, charged the chopper's battery, keeping it aloft for 12 hours and 27 minutes.
激光瞄准安装在鹈鹕下面的光伏电池,给直升机的电池充电,使它在空中飞行了12小时27分钟。
2. Through stubby spinneys of akeake, I saw the bend of a river, as silvery as the underside of a fern.
透过矮壮的新西兰坡柳小树林我看到了河湾,像蕨类植物叶子背面一样闪着银光。
3. When pouring molten glass onto the molten tin, the underside of the glass would also be perfectly flat.
当把玻璃液倒在锡液上时,玻璃的底面也会变得完全平整。
4. If it started to rain, she would share her umbrella with me, and I would get to see the underside of a toadstool for the very first time!
假若下起雨来,她会与我共撑一把伞,我就可以第一次看到伞菌的底部!
5. The underside of the rock was covered with seaweed.
岩石下面布满了海藻。