1.下面;内面;小腹
1.the bottom side or surface of something
2.a bad aspect of something, that people do not usually see or talk about
1.His arms are raised above his head, and he faces up and to his right, exposing his neck and the underside of a short beard.
祂的两臂高举过头，面朝右上方，露出颈部与短胡子的下面。
2.With it "installed, " though, she reported a slight breeze only when placing her fingers very close to the underside of the door.
但是另一道门有“节能门缝挡”吸收了冷空气后，她把手指伸到离门缝非常近的地方，才感觉得到一点凉风。
3.I place the tip of the cane on the underside of your cock and slide it up and down the shaft. It gently taps on your balls.
我将藤条的末端放在你的阴茎上，然后轻轻的滑动一下，它便上下抖动起来。
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，于是我第一次看到伞菌的底部！
5.It had no fins and no tail. Along the underside of the cone ran a flexible, fleshy tube.
它没有鳍和尾巴，沿着它的下腹部有一根柔韧的圆锥型的肉质管子。
6.As you exhale, have your partner pull on your arm and push into your hip crease, stretching the underside of your torso.
呼气的时候，你的同伴拉你的手臂向上，推髋的折处向中间，伸展你上身的下侧。
7.Bruises along the underside of his arm throbbed impatiently and he felt like he was about to puke again.
他胳膊下面的瘀伤没有耐性地悸动着，他感觉自己又要吐了。
8.The company fitted Citroen electric cars with receiver pads on the underside of the car, allowing the batteries to be charged wirelessly.
该公司在一款雪铁龙电动车的底部安装了电力接收垫，使其可以通过无线方式给电池充电。
9.Although it's easy to laugh at such military manoeuvring, there's a dark underside to such blatant interventions.
尽管军方的此类行动很容易遭人嘲笑，但这种露骨的干涉后面却另有隐情。
10.It also hangs suspended from the underside of the surface film by its tail, which acts as a breathing tube.
它也能用尾巴倒挂在水面薄膜下面，尾巴就是它的呼吸道。