selection pressure的用法和樣例：
例句
- During breeding for vertical resistance, horizontal resistance tends to decline because of negative selection pressure.
當培育垂直抗性時(shí)，由于負的選擇壓力，水平抗性趨于下降。 - Selection pressures pull in different directions, and the adaptation that results is some kind of compromise.
選擇壓力往不同的方向拉，結果產(chǎn)生的適應是某種類(lèi)型的妥協(xié)。
