单词学习：overburdened Adjective (形容词)
overburdened
/ˌoʊvərˈbɜːrdnd/
负担过重的，不堪重负的
Ms. Gu, the overburdened teacher, still managed to prepare an excellent lesson for her students.
负担过重的顾老师，仍然设法为她的学生们准备了一堂精彩的课。
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