However, due to the complexity of the SQL required to match on so many fields, and potentially, the size of the text of those fields, the performance of this implementation is usually very poor.

然而，因为复杂的SQL要去匹配太多的字段，并且很多情况下由于这些字段的文本长度问题，造成实现的性能经常是非常差的。

youdao

Now, this is what occurs to me: you’re very rich—at least you’re always telling me so—and she’s very poor.

你瞧，我想到这么个招儿：你很有钱——至少你老是这样对我说——而她很穷。

youdao

Most people judge currencies on a relative basis. This is a very poor measure of the value of a currency since it doesn't take into account the total destruction of paper money in the last 100 years.

大多数人都用相对价值来看待货币，这种方式完全没有考虑到过去一百年货币的大贬值。

youdao

This person is very poor and only has enough money for the most important things in life,like food.

VOA: special.2010.06.20

Yes, this is a book about the privations of growing up in the South poor and black, but it is very much, very consciously, a book about the development of someone who attends to language.

书的着重点的确是,记述在南方成长的穷孩子，但作者刻意地描述了，一个关注语言人的成长经历。

耶鲁公开课 - 1945年后的美国小说课程节选

This is a very poor deal for taxpayers.

WSJ: Bjorn Lomborg: Green Cars Have a Dirty Little Secret

This is a very poor country.

CNN: Blitzer in North Korea: Life in a tinderbox

"This is related to very poor yields in a lot of African countries that make it a requirement for countries to go out of their borders and go outside of the continent to meet food requirements for their people, " he says.

CNN: Agriculture must play 'critical role' in Africa's future