1、aggressive

好斗的；挑釁的

Some children are much more aggressive than others.

一些孩子比其他孩子更好斗。

These fish are very aggressive.

這些魚極具攻擊性。

有闖勁的；積極進取的

He is respected as a very aggressive and competitive executive.

他是一位銳意進取、競爭意識很強的主管，頗受尊敬。

The Zambian game is much more aggressive than European soccer.

贊比亞的這種運動比歐式足球要激烈得多。

2、concentration

全神貫注;專心;專注

Neal kept interrupting, breaking my concentration.

尼爾不停地打斷我，使得我無法集中注意力。

We lacked concentration and it cost us the goal and the game.

我們注意力不夠集中，結果丟了球，輸了比賽。

集中;匯集

The area has one of the world's greatest concentrations of wildlife.

這個地區是世界上野生動物最為密集的區域之一。

There's been too much concentration of power in the hands of central authorities.

權力一直過多地集中在中央機構手中。

濃度

pH is a measure of the concentration of free hydrogen atoms in a solution.

pH值是測試溶液中自由氫原子濃度的單位。

The latest data showed that global ozone concentrations had dropped several per cent over the last decade.

最新數據顯示，過去10年來全球臭氧的濃度降低了幾個百分點。