什么是 aggressive?Characterized by aggression: aggressive behavior. Inclined to behave in an actively hostile fashion: an aggressive regime. Assertive, bold, and energetic: an aggressive sales campaign. Of or relating to an investment or approach to investing that seeks above-average returns by taking above-average risks.Fast growing; tending to spread quickly and invade: an aggressive tumor. Characterized by or inclined toward vigorous or intensive medical treatment: an aggressive approach to treating the infection. Intense or harsh, as in color.