评论
打印
重点讲解：
1. clean up 打扫；清扫；把…弄干净；
例句：Mama made him clean up the plate.
妈妈要他把盘子洗干净。
2. hold up 举起；抬起；提起；
例句：She held up her hand stiffly.
她直挺挺地举着手。
3. think back 回忆；回想；
例句：Thinking back, I don't know how I had the courage.
现在回想起来，我都搞不清我当时哪来的那股勇气。
v. 冻结，冷冻，僵硬，凝固
n. 结冰，冻结
