🧩 词语组成解析
river
['rivə]
n. 河，江;溪，巨流;
dolphin
['dɑlfɪn]
n. 海豚;（码头的）系船柱;
🗣️ 情景例句
Do you happen to know...
你是否碰巧知道…
Dad is welcoming uncle Bob.
老爸去迎接鲍勃叔叔。
The steps are rather narrow.
这些台阶相当窄。