1、speed up

a、加快(…的)速度

You notice that your breathing has speeded up a bit...

你注意到自己的呼吸加快了一些。

He pushed a lever that speeded up the car.

他掛擋加快了速度。

b、(使)(某一過程或活動)加快

Job losses are speeding up.

失業趨勢正在不斷加快。

I had already taken steps to speed up a solution to the problem...

我已經采取措施加快解決該問題。

2、below

a、介詞（位置）在…下面，低于

He appeared from the apartment directly below Leonard's...他從倫納德家正下方的公寓里走了出來。

b、在地下；在地表以下

They have designed a system which pumps up water from 70m below ground...

他們設計了一套從地下70米處抽水的系統。

c、以下；在下文中

Please write to me at the address below...

請按照下面的地址給我寫信。

d、（數量、比率或水平）低于，小于，少于

Night temperatures can drop below 15 degrees Celsius.

夜間氣溫會降到15攝氏度以下。