1 . Friendship means understanding, not agreement. It means forgiveness, not forgetting.It means the memories last, even if contact is lost .
2 . He missed the catch and the match was lost .
3 . He lost two stone in weight during his time there.
4 . The victim suffered a dreadful injury and lost a lot of blood.
5 . The armed forces have launched offensives to recapture lost ground.
all is not lost
1 . 还有机会（取得胜利）
be lost for words
2 . 因非常惊讶（或迷惑、失望）而不知该说些什么
be lost on
3 . 对（某人）不起作用
4 . (非正式)[经常用祈使语气表示恼怒或没耐心]走开，别来烦我
give someone up for lost
5 . 不再（对失踪的人）抱生还的希望
make up for lost time
6 . 赶进度，补回损失的时间
2.no longer in your possession or control; unable to be found or recovered;
a lost child
3.having lost your bearings; confused as to time or place or personal identity;
I frequently find myself disoriented when I come up out of the subway
4.spiritually or physically doomed or destroyed;
5.not gained or won;
a lost battle
6.incapable of being recovered or regained;
his lost honor
7.not caught with the senses or the mind;
words lost in the din
8.deeply absorbed in thought;
as distant and bemused as a professor listening to the prattling of his freshman class
9.no longer known; irretrievable;
a forgotten art
10.perplexed by many conflicting situations or statements; filled with bewilderment;
obviously bemused by his questions
11. unable to function; without help