puzzle是可数名词。
Both her children did jigsaw puzzles easily.
她的两个孩子玩拼图游戏都很轻松。
I don't have the patience to do jigsaw puzzles.
我没有耐性做拼图游戏。
Some puzzles look difficult but are actually quite simple.
有些谜看似很难,但实际上相当容易解开。
He spent his time devising incomprehensible mathematics puzzles.
他把时间花在设计难以破解的数学难题上。
Each week brought new puzzles.
每个星期都会有新的难题出现。