慢速英语:Robot Helps Heal Human Muscle Damage

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短语讲解：

1. Luna is still able to detect them.

be able to 能，会; 能够
例句：He is able to free Jim from the immediate evil of slavery. 
他能够把吉姆从奴隶制度的直接祸害中拯救出来。 

2. In any case, a child wants to win a game, wants to compete, but in fact they are exercising.

in fact 实际上，其实
例句：In fact, I'd like your autograph. 
事实上 我想要你的签名。