a. 怠惰的, 懒惰的
He was not slothful: he had been busy all night.
他可没偷懒：他忙了整整一夜。
背单词最牢的方式是在剧情里遇见它。SubSense 看剧时只高亮你不认识的词， 点一下就能看到这一页的释义与例句，还能加入间隔重复复习。