Rcas
(rca 的复数) abbr. 美国无线电公司（Radio Corporation of America）
🗣️ 情景例句
I have a new math program, and I want to learn how to use it.
我有一个新的数学程式 我想学习怎样用。
Today is May 21st.
今天是五月二十一号。
it may have been because curiosity attracted them and because the scent of a possible meal attracted the sharks.
那么它们可能是出于好奇；而鲨鱼可能是闻到了可以美食一顿的香味。