airtightadj.
英 'eətaɪt | 美 'ɛrtaɪt
中文adj. 密闭的，密封的；无懈可击的
词根词源
airtight (adj.)also air-tight, "impervious to air," 1760, from air (n.1) + tight. Figurative sense of "incontrovertible" (of arguments, alabis, etc.) is from 1929.
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