一种定义
四种语言
0,1,2
- 德國
- 英語
- 中國
- 西班牙語
浓度 (n)
Konzentrationsmaß (n)
concentration (n)
The proliferation of shadows on the working surface can irritate users and impair their concentration.
This can lead to tiredness, lack of concentration and even to skin problems and respiratory complaints.
Some work requires users to maintain an appropriate level of concentration.
