He was thumping the keys of the piano.

他用力弹钢琴。

Too much force will twist the key.

用力过猛会把钥匙扭弯。

I squashed into the middle of the crowd.

我用力挤到人群的中间。

He hit me smack in the face.

他用力打我的脸。

The crew hauled at the heavy sail.

水手们用力拉笨重的船帆。

He tore at the wrapping of the parcel.

他用力撕包裹的包装纸。

The robbers rammed the gag in her mouth.

强盗用力将塞进她口中。

She picked up the sledgehammer and began banging away with enthusiasm.

她拿起大锤用力敲打起来。

The porter had to force the window open every morning.

每天早晨好用力硬把窗户打开。

Nowadays I seem tired with the least exertion.

现在我好像稍一用力就感到疲劳。

He gave it a mighty push and it opened.

他用力推了一下，它开开了。

He gave the boy’s ear a painful tweak.

他用力拧了一下那男孩的耳朵。

He rubbed his limbs vigorously to get the blood circulating.

他用力摩擦四肢让血液循环开来。

He hurled the brick through the window.

他用力把砖头从窗户投进去。

I wish that she would not hit the keys of the typewriter so hard.

我真希望她不要那么用力敲打字机键盘。

Leila tried to wrest her arm from his hold.

利拉用力扭动手臂，试图挣脱他的箍制。

There's someone battering at the door.

有人在用力敲。

They hauled away on the ropes.

他们用力拉绳子。

Second, the selectivity depends on the Coulomb interaction on the surface, not the lipophilicity.

第二，选择性与表面的库伦作用力有关。

I had to tug hard and at last freed him.

我不得不用力拖，最终把他解救出来。