名詞：concentration.
釋義：
n. 集中；專心；濃度
例句：
用作名詞 (n.)
The tennis players need total concentration during play.
網(wǎng)球運(yùn)動(dòng)員在比賽中需要全神貫注。
短語(yǔ)：
1）disrupt〔disturb〕 one's concentration 擾亂注意力
2）deep concentration 聚精會(huì)神
3）in concentration 專心地
4）concentration of fire 火力集中