Tcsec
可信計算機系統評價準則
??? 情景例句
I propose issuing a time draft for US $ 100,000.
我建議開具價值10萬美元的遠期匯票。
I have to hang up now.
我現在不得不掛電話了。
or through hiring it, the total expense can be far less than the cost of hotels.
總費用算起來要比住旅館開支少得多。