The results show that when the brazing temperature is lower or the holding time is shorter, the metallurgic reaction is not strong and the connection is not tight;

结果表明，钎焊温度过低或保温时间过短，钎料与母材相互冶金作用较弱，接头性能较差；

youdao

But knowing what percentage this is of the total amount leaking from the well will not be possible until a tight seal is on the well.

VOA: standard.2010.06.14

That's how tight the junctions are, not even a small molecule like glucose can pass between them.

可见胞间连接多么紧密,甚至像葡萄糖这样小的分子也不能通过

耶鲁公开课 - 生物医学工程探索课程节选

Some tourniquets that were used in the right situation were not tight enough, causing bleeding to actually get worse.

WSJ: Once-doubted tourniquet seen as Boston lifesaver

At the other extreme, Ireland, which ran a large budget surplus last year, might be forced to run an even bigger one if the single monetary policy is not tight enough to suit its needs.

ECONOMIST: Europe grows apart

Shirts should be close to the body but not so tight the buttons pop out.

FORBES: How To Dress Like An Italian Man