Ipsec
abbr. 網(wǎng)際協(xié)議安全（Internet Protocol Security）
??? 情景例句
You lost by a very small number of votes.
輸?shù)钠睌?shù)非常少。
Woe to him that is alone.
孤獨(dú)的人最苦惱。
Li Lei ran much faster than the other boys.
李磊跑得比其他男孩快得多。