Threadless
a. 無線的, 無螺紋的
??? 情景例句
Good luck!
祝你好運
That's a good idea .
那是個好生意。
On the day before our departure, several bus loads of tourists descended on the town.
我們離開小鎮(zhèn)的前一天，鎮(zhèn)上來了幾輛滿載游客的公共汽車。