Advance English2 第5-8课词汇短... ... precarious (adj.) : uncertain；insecure；risky不稳定的；不安全的；危险的 eczematous (adj.) : of itching skin disease湿疹的 patina (n.) : a fine crust or film on bronze or copper．usually green or greenish—blue，formed by natural oxidation and often valued as being ornamental(青铜器上的)绿锈 ...
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