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1.recover 恢复
He's still recovering from his operation.
手术后，他仍在恢复之中。
2.fuse融合
The skull bones fuse between the ages of fifteen and twenty-five...
头骨在 15 至 25 岁之间长合。
3.embed嵌入
The fossils at Dinosaur Cove are embedded in hard sandstones...
恐龙峡谷中的化石都嵌在坚硬的砂岩中。
4.innocuous 无害的
Both mushrooms look innocuous but are in fact deadly...
这两种蘑菇看起来似乎都无害,实际上却是致命的。
