In release builds, do not return unknown exceptions as faults except in diagnostic scenarios.

在发布构建版本里，不要返回不可知的异常做为错误，除非是在调试场景里。

youdao

The wildcard in all of this is Rose, whose return is still unknown although he has been practicing with the team.

WSJ: Lopez, Blatche help Nets hold off Pistons, 103-99

With the majority of CDOs being backed by mortgages, the principal-only tranche has a known future cash flow, but at a variable rate of return, while the interest-only tranche has both an unknown cash flow and an unknown rate of return on that cash flow.

FORBES: 3 Bonds You May Have Never Heard Of

But Gervais has promised Brent will return, although it is unknown whether he will just come back for a one-off or a whole series.

BBC: Gervais and Kay playing for laughs