松开；解开( unfasten的过去式和过去分词 )；解开，脱开，松开；

1.

1. 被松解：the heavens 天 | unfastened 被松解 | and open, 和打开,

1. not tied

    Synonym: untied

2. not buttoned

    e.g. the wind picked up the hem of her unbuttoned coat

    Synonym: unbuttoned

3. affording unobstructed entrance and exit
    not shut or closed

    e.g. an open door
           they left the door open

    Synonym: open

4. not closed or secured

    e.g. the car door was unfastened
           unfastened seatbelts