听力资源简介：

join　
(v.) 参加

He joined the baseball team last month. Now he plays every day.
他上个月加入棒球队，现在他每天都在打棒球。

probably　
(adv.) 很有可能

Look at those dark clouds. It will probably rain.
瞧瞧那堆乌云，很有可能会下雨。