4. fall over

    意为“落在……之上、脸朝下跌倒”。

    例句：He was walking along and suddenly he fell over.

    他走着走着突然摔倒了。

    5. shelter from

    Shelter做动词有“掩蔽、庇护”的意思，“shelter from”意为“掩护、保护、(使)躲避……”。而“shelter somebody from sth”是指“掩护某人以免……”。

    例句：They huddled in the shop doorway to shelter from the rain.

    他们挤在商店门口躲雨。

    He is trying to shelter his boss from criticism.

    他极力为老板顶住外界的批评。

    6. stretch out

    该词组有多种意思，在文中指的是“延伸、绵延”。另外它还可指“伸直、伸出、伸展；满足需要”。

    例句：The years ahead seemed to stretch out for ever.

    未来的岁月似乎绵绵无尽 ......