Joking aside, we really must do sth.

说笑归说笑，我们真得做点事了。

He mumbled sth. to me but I could not hear what he said.

他对我咕哝了几句，可是我没听清他说的什么。

The man sneaked about the place watching for a chance to steal sth.

那儿鬼鬼祟祟地走来走去，想找机会偷东西。

When you have paid for sth., a receipt is given to you.

当你付了某个东西的钱时，就给了你收据。

Accordingly, furniture should be put firm, edges and corners is due the parergon such as a cotton-padded covering for keeping sth warm, in case the child is broken.

因此，家具要放稳，棱角应有棉套等辅助，以防孩子被砸伤。

A lot of American safety the expert thinks the United States already battle of body clapnet sth resembling a net, and moving toward failure gradually.

美国许多安全专家认为美国已经身陷网络战，且正逐渐走向失败。

He's always bleating about sth.

他总嘀咕什么。

I am hearkening...... I doing feelingly for sure, but I doing put a bold face on sth.Pretending.

我楼上听着…… 明明是很感动，却要作心理满不乎。

The tune goes sth. like this.

那个曲子是样唱的。