21. 肥沃的
Rich Fertile
22. 贫瘠的
Barren Infertile Lean
23. 优点
n. Advantage Merit Virtue Edge Excellence Predominance
adj. Superior Positive
24. 缺点
n. Weakness Drawback Shortcoming Flaw Vulnerability Demerit
adj. Inferior Negative
25. 重要
adj. Important Significant Essential Crucial Vital
n. Importance Significance
26. 危险
Danger Endanger Dangerous
Hazard Hazardous
Threat Threaten Threatening
Jeopardy Jeopardize Jeopardous
Risk Risky
27. 种类
n. Type Category Classification
v. Sort Categorize Classify
