underlayn.
英 ʌndə'leɪ | 美 'ʌndɚle
中文n. 衬底；衬垫物；支撑物\nvt. 垫起；从下面支撑\nvi. 倾斜；向下延伸
衬底；衬垫物；支撑物
vt. 垫起；从下面支撑
vi. 倾斜；向下延伸
词根词源
underlay (v.)Old English under lecgan "to support by placing something beneath;" see under + lay (v.). Related: Underlaid; underlaying. Compare similarly formed Old High German Related: untarleccan, German unterlegen.
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