Unidirection
[計] 單向
??? 情景例句
She looks neat and fresh.
她看起來優雅清新。
The radio is out of order.
這收音機壞了。
but the means of escape from holiday hell(if the beach proves too crowded, the local weather too inclement)
而且也是逃離假日地獄（如海灘太擠，當地天氣惡劣）的方便工具，