【每日一记】
1. audio
[释义] n. / a. 音频(响)(的)；声音(的)，听觉(的)
2. frog [frɔg]
[释义] n. 蛙
[例句] the croaking of frogs 蛙鸣.
3. idle [ˈaɪdl]
[释义] a. 空闲的,闲置的;懒散的 v. 空费,虚度
[例句] Many people were idle during the depression. 在那萧条时期, 很多人都无事可做.
4. spacecraft
[释义] n. 宇宙飞船
5. flu [flu:]
[释义] n. (influenza)流行性感冒
6. inventory [ˈɪnvəntrɪ]
[释义] n. 详细目录,存货,财产清册,总量
[例句] keep/make a full, complete, careful inventory (of sth) 记录[开列]（某事物的）详尽的、 完整的、 仔细的清单. inventory, v (pt, pp -ried) [Tn]
7. skeptical
[释义] a. 怀疑的 [英]sceptical
8. naval [ˈneɪvl]
[释义] n. 海军的,军舰的
[例句] a naval officer, uniform, battle 海军军官、 海军制服、 海战
9. interval [ˈɪntəvl]
[释义] n. 间隔,间歇;(幕间或工间)休息
[例句] the interval between a flash of lightning and the sound of thunder 闪电和雷声之间的间隙
10. altitude [ˈæltɪtju:d]
[释义] n. 高度，海拔；[ pl. ]高处，高地
[例句] What is the altitude of this village? 这个村子海拔多少?
