Although he was not very confident ,but he accepted his friend's concentrasion to swim across a river.是concentration,这个词应作何理解?

问题描述:

Although he was not very confident ,but he accepted his friend's concentrasion to swim across a river.
是concentration,这个词应作何理解?

尽管他不是十分的有信心,但是他还是接受了他朋友的关注,要去游过这条河
(句子有错,后面的but要去掉,同时concentrasion也是错的)
补充:concentration是 n. 集中; 专心; 关注; 浓度

尽管他不是十分的有信心,但是他还是接受了他朋友的关注,要去游过这条河
(句子有错,后面的but要去掉,同时concentrasion也是错的)
补充:concentration是 n.集中; 专心; 关注; 浓度