1.blue whale蓝鲸

But past studies suggest only blue whale males make calls like this.

但是在过去的研究表明，只有雄性蓝鲸才会这样唱歌wown+g59JF[jVk。

2.require for 需要

There may be scenarios where most of the data you require for reporting exists in one database with the exception of a few other key tables.

有可能存在这样的场景：您的报告需要的大部分数据都存在于一个数据库，但几个关键表除外nkdtmQ@E[-dL-+%.b。

3.hold back 抑制；阻止

Stagnation in home sales is holding back economic recovery.

住房销售的停滞正阻碍着经济的复苏4DQhxJ1crbk7S。