VOA慢速英语:Everyday Grammar: Put Prepositions in Their Place

短语讲解：

1. This adds up to 150 chances to make mistakes.

add up 加起来;  总计
例句：The bills add up to exactly $100. 
这些帐单加起来正好一百元。 

2. She says changes such as migration away from rural areas are allowing more women to find work and provide for their families.

away from 远离; 相距
例句：She was seen running away from the scene of the crime. 
有人看见她从犯罪现场跑开. 

3. The expression using “to” is rather new to American English, according to the Internet application Google Ngrams.

according to 根据
例句：The price of vegetables fluctuates according to the weather. 
蔬菜价随着天气变化而波动。 

4. But we hope that we have been able to provide assistance to all of our listeners and readers.

be able to 能够
例句：We must be able to stay impartial at all times. 
我们必须经常保持公正的态度。