Precursory
a. 先驱的, 前兆的
✅ 同义词
🗣️ 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。
He who purposes to be an author, should first be a student.
想当作家，相当学生。
On arriving in England, they were taken to the Crystal Palace by train.
一到英国，火车就把他们送到了水晶宫。