【明報專訊】"Maybe I've got this wrong!" Oliver cried. "My boat overturned (翻轉) and here I am, sinking to the depths of the sea clutching (抓着) someone's teeth! Isn't that what this idiom tells me to do?" Not exactly, Oliver. First, you shouldn't cling to (緊緊抱住) something that's going to sink. Second, to hold on to something by one's teeth means to make a strong and determined effort to survive in a critical situation (危急情况). "Fearful of drowning, I held on to those things by my teeth until I was rescued (被拯救)!" Oliver exclaimed.