Canvasing
vt. 用帆布覆盖（canvas的现在分词形式）
🗣️ 情景例句
I heard the professor of that class is very good.
我听说那个班的教授很好。
Liberty often degenerates into lawlessness.
自由随便，经常堕落到无法无天。
What invariably happens is that a great number of things choose to go wrong at precisely the same moment.
情况经常是这样的，许许多多的事情都偏偏赶在同一时刻出问题，