有几个英语词组不知道什么意思，帮忙翻译一下！谢谢！

set off:
1.出发,动身
They set off in search of the lost child.
他们出发寻找失踪的孩子。
2.使爆炸

end with:
以……结束

make...speechless:
使...说不出话来(或无语）

set off
1.出发, 动身
He proposed to set off immediately.
他建议立即动身。
2.(使)开始; 引起
She had stopped crying but his shouting set her off again.
她已经不哭了, 但是他的大声喊叫使她又哭了起来。
If uncontrolled, the shortage would set off a new rise in meat prices.
如果不加控制, 这种短缺会引起肉价再次上涨。
That set all of them off laughing again.
那又惹得他们哄堂大笑。
3.点燃, 爆炸
Be careful that you don't set the fireworks off by mistake.
当心点, 别弄错了引起那些爆竹爆炸。
The children are setting fireworks off in the garden.
孩子们在花园里燃放烟火。

end with
以…结束

make...speechless
令...无语

1.set off .1. 出发, 动身 He proposed to set off immediately.
他建议立即动身。
2. (使)开始; 引起
If uncontrolled, the shortage would set off a new rise in meat prices.
如果不加控制, 这种短缺会引起肉价再次上涨。
3. 点燃, 爆炸
The children are setting fireworks off in the garden.
孩子们在花园里燃放烟火。
2.以......结束
The wedding ended with the speech of pastor.
婚礼以牧师的演讲结束。
3.对.......无语
What he says makes us speechless。
他所说的使我们无语

set off
1.出发, 动身
2.(使)开始; 引起
3.点燃, 爆炸
end with
以…结束
make...speechless
令...无语