acceleration = ac(加强) + celer(快) + ation(表结果) = n.加快，加速
acclimatise = ac(加强) + climat(环境) + ise(表动词) = （使）适应新气候或环境
Police acknowledged the need to patrol the area.
The government has finally acknowledged the problem.
Wodehouse was widely acknowledged as one of the finest comic writers in English literature.
He is widely acknowledged as an excellent goalkeeper.
Most people now acknowledge that there is a crisis.
The government has acknowledged that problems do exist.
Alec barely acknowledged Max and I were even getting married.
The army sent me a letter acknowledging my request.
I would like to acknowledge receipt of your letter of November 27.
He is fighting to be acknowledged as the child's father.
She never even acknowledged the man who opened the door for her.
He didn't even bother to acknowledge her.