單詞與短語：
1. commitment n. 承諾，保證
eg. We made a commitment to keep working together...
我們承諾繼續合作。
eg. They made a commitment to peace.
他們承諾要維護和平。
2. ungraded adj. 劣質的，沒有分等級的
eg. You can revert any ungraded assignment back to draft status.
您可以把任何未打分的作業恢復成草稿的狀態。
eg. The vegetables I just bought are all ungraded goods.
我新買進的蔬菜都是統貨。
3. idiot n. 笨蛋，白癡
eg. I knew I'd been an idiot to stay there...
我知道我呆在這里很蠢。
eg. You're an idiot!
你是個白癡！
4. collapse v. 倒塌，瓦解
eg. Most of the deaths were caused by landslides and collapsing buildings.
大部分死亡是由山體滑坡和建筑倒塌造成的。
eg. His business empire collapsed under a massive burden of debt...
他的商業帝國無力承擔沉重的債務負擔而垮掉了。
5. be grounded 關禁閉
eg. He is always grounded by his parents for a week.
他常常被父母禁足一周。
eg. That's why you are grounded for two months!
這就是為什么你被禁足兩個月!