گزارش خطا در معنی کلمه 'concentrate at'

1 general:: Phrase(s): concentrate someone or something at something to cause people or things to gather at a place; to cause people or things to convene or converge at a place. • You shouldn’t concentrate all the guards at one entrance. • The general concentrated all the big guns at the entrance to the valley.

2 general:: Phrase(s): concentrate at some place to gather thickly at a place. • The moths concentrated at the window at night, attracted by the light. • All the thirsty children concentrated at the water fountain.