safe running days [交] 行车无事故天数 ; 行车无事变天数
number of safe operation days 安全运行天数
safe days
安全的天
以上为机器翻译结果，长、整句建议使用 人工翻译 。
It's hard not to conclude that Stansky and the panjandrums at Fidelity are playing it safe these days.
FORBES: Truth in packaging
Aviation may be very safe these days, but it's a risky place to invest, with notoriously poor returns.
BBC: A new Scottish airline?
No one is safe these days from the mouse protectors.
FORBES: Of Mice and Mischief
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