1.
Back and forth swung the pendulum.
钟摆来来回回地摆动。
2.
To cause to rebound.
使跳回，使回升，使回响
3.
move or pull(sth)back or in
缩回或拉回（某物）
4.
multiloop feedback
多回路反馈[回输]
5.
To spring back, as upon firing.
弹回，跳回弹回，如因开火而弹回
6.
"Looking Backward, 2000-1887"
回溯2000-1887
7.
To avoid giving a direct answer to.
回避避免做直接回答
8.
You got in/home very late last night.
昨夜你回来[回家]很晚.
9.
-Get back to the ship!-Where are you going? Come back!
-回船上 -你去那里﹖回来！
10.
The echo was returned By the canyon wall.
回声是峡谷壁传回来的
11.
make no response
不回答,不回应,不应答
12.
mean echo balance return loss
平均回波平衡返回损耗
13.
having or producing no echo.
没有回声或不产生回声。
14.
Of or relating to a gyrus.
脑回的或与脑回有关的
15.
Please answer me / my question.
请回答我／回答我的问题。
16.
echo meter=echometer
回声测试器回声测深仪
17.
The act of withdrawing or going back.
后退撤回或退回的行为
18.
horizontal flyback period
水平回扫[行回扫]周期