351. The lecture which lasted about three hours was so tedious that the audience couldn't help yawning.
譯文
持續(xù)了三個(gè)小時(shí)的講座太枯燥了，聽眾都忍不住打呵欠了。
點(diǎn)睛
couldn't help doing sth.相當(dāng)于can't help doing sth.，意為“不能控制自己（情不自禁地）去做某事”。如：
I can't help refusing to accept his invitation. 我不禁拒絕了他的邀請(qǐng)。
