fail safe safety interlock 故障自动防护联锁装置
Intrinsic Safety Intrinsically Safe 本质安全
safe function of safety devices 安全设备的安全功能
Elke Steinwender says there are many levels of safety built into the Kids Club to make sure that children have a safe and fun experience online.
VOA: special.2010.12.28
"The president understands that his most important job is to keep the American people safe, and that he is not going to make any decision or any judgment that imperils the safety of the American people,"
VOA: standard.2009.05.20
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