1. It is antisocial to leave one´s litter in public places.
    在公众场所遗弃杂物是妨害公众利益的.

2. It is unwise to leave lethal weapons within children´s reach.
    把危及人命的武器放在孩子们可以拿到的地方是欠考虑的。

3. It would be a breach of duty for the guard to leave before his replacement comes.
    守卫在替补者尚未来之前离开岗位，是不忠于职守的。

4. If there is one----which I take leave to doubt----then it is older people who create it, not the young themselves.
    如果这个问题存在的话 -- 请允许我对此持怀疑态度 -- 那么，这个问题是由老年人而不是青年人造成的。

5. I would leave the next day to accompany an important Chinese businessman to tourist sites in northern Thailand.
    我必须在第二天出发陪一位重要的中国商人到泰国北部的旅游点。

6. For university students, like those in Harvard, Cambridge, or Massachusetts: cheaters are normally required to leave for two back-to-back terms.
    大学生作弊：如哈佛大学、剑桥大学或麻省理工学院的学生，一旦被发现作弊，通常必须连续休学两个学期。