They are tolerated and supported so long as they do not get close to a certain limit.

它们得到容忍和支持的前提是，它们不能太靠近某种底线。

youdao

Up to a certain limit, beyond which swimmers will lose their sense of vision, deeper pools allow the waves to dissipate down to the bottom, leading to less water disturbance to the swimmers.

到一定限度，超出该游泳运动员将失去他们的视觉感，较深的池允许波消散下到谷底，导致水少干扰泳客。

youdao

If an operating system bug, bad disk sector, or even certain superuser errors cause corruption to a file system, using multiple volumes can limit that damage to just one volume.

如果操作系统缺陷、磁盘坏扇区或某些超级用户失误会破坏文件系统，使用多个卷可以把破坏的范围限制在一个卷。

youdao

Still no problem: it can lend to Bank A, borrowing from the ECB, and take very poor collateral, by permission of the ECB, up to a certain limit.

BBC: Watch deposit flight, not the eurocrats

The Federal Deposit Insurance Corp. makes sure that when a giant bank fails like Washington Mutual depositors are protected and their accounts are covered up to a certain limit.

NPR: Are We Teetering On The Edge Of Depression 2.0?

Following the collapse of a third of all American banks in 1930-33, the government set up an insurance scheme under which it guaranteed to repay depositors, up to a certain limit, in the event of bank failure.

ECONOMIST: The business of banking | The