This tutorial describes subqueries stated as conditions in the WHERE clause, which are useful for simpler comparison queries.

本教程描述在 WHERE 子句中作为条件的子查询，这些子查询对于较简单的比较查询很有用。

youdao

But a head-to-head comparison of LCSs and Type 022 as warships is not really useful, as neither is specifically intended to fight the other.

不过，将022型与LCS作为战舰面对面地进行比较，并没有什么真正的用处，因为任何一方都不是特地设计来向另一方发起攻击的。

youdao

GDP per capita is not a particularly useful measure of what qualifies a country as a superpower, and the comparison with Namibia is just facile nonsense.

一个国家有没有资格成为超级大国，人均GDP不是特别有用的度量，与纳米比亚比较，只是浅薄的妄语。

youdao