News Plus慢速英语:清华大学在分子生物学领域做出重要成果 中国4500米水下机器人在南海试验成功

重点讲解：
1. no longer 不再；已不；
例句：He must face up to the fact that he is no longer young.
他应该勇于正视自己不再年轻这一事实。
2. be designed to do sth. 预定；指定；
例句：Air bags are designed to soften the impact of a car crash.
气囊用来减轻汽车碰撞的冲击力。
3. up to 高达；多达；
例句：The cottage could accommodate up to five people.
这间小屋最多能容纳5个人。
4. as well as 除…之外；也；还；
例句：The mind needs exercise as well as the body.
大脑同身体一样需要锻炼。