VOA慢速英语:Less Salt Can Mean More Life

advise表示建议

advise, caution, warn, admonish, counsel
这些动词均有“劝告、忠告、警告”之意

advise ：普通用词，泛指劝告，不涉及对方是否听从劝告。

caution ：主要指针对有潜在危险而提出的警告，含小心从事的意味。

warn ：含义与caution相同，但语气较重，尤指重后果。

admonish ：一般指年长者或领导对已犯错误的或有过失的人提出的忠告或警告以避免类似错误。

counsel ：正式用词，语气比advise强一些，侧重指对重要问题提出的劝告、建议或咨询。

2.The American Heart Association advises no more than three grams for healthy people.

no more than =only只有，仅仅，只不过

There are no more than a hundred people in the hall.大厅里只有100人。

not more than=at the most不超过，至多

There are not more than a hundred people in the hall.大厅里至多100人。

3.Parents given the counts chose an average of one hundred two fewer calories when asked what they would order for their children.

an average of平均有(跟数词)

例句：An average of two students are absent each day.
      每天平均有两个学生缺席。

4.study leader Pooja Tandon says even small calorie reductions on a regular basis can prevent weight gain over time.

on a regular basis定期地，经常地，basis前面加形容词。