吃紧的英文：
be critical

参考例句：

Financially things are a bit tight.
经济上有点吃紧。

Another countermeasure has been selling to cash-strapped customers on credit.
另一条对策是对那些现金吃紧的客户进行赊销。

Alas, what is "tight" and "cheap" money is far from clear at any particular time.
当然何谓吃紧﹖何谓便宜的资金﹖很难有一个清楚的分野

critical是什么意思：
adj. 紧要的，关键性的；批评的，评论性的；爱挑剔的；必不可少的；临界的

a critical juncture; a critical moment
关头

Their criticism was not negative.
他们的批评并不是负面的。

Criticism of Germany, by comparison, is muted.
相比之下，德国的指责算是柔和的了。

You are free to criticize my work.
你可以随意批评我的工作。

Please criticize my painting.
请评论我这幅画。