s taking immediate advantage, often unethically, of any circumstance of possible benefit
a. 机会主义的, 投机取巧的
1. The opportunistic businessman took advantage of the market's downturn to buy cheap stocks.
那个投机的商人利用市场下跌的机会购买了便宜的股票。
2. Some opportunistic animals adapt quickly to changes in their environment.
一些投机性的动物能够快速适应环境的变化。
3. She made an opportunistic decision to travel when she found a last-minute flight deal.
她在发现最后一分钟的航班优惠时做出了一个机会主义的决定去旅行。