Unit3 Under the seawords and expressions
1．annual adj. 每年，一年一次What's your annual salary? 你年薪是多少?an annual report  annual rainfall   adv. annually
年度汇报
年降雨量
2. witness: vt. 当场见到/ 目击Did anyone witness the accident?vt.表明/ 说明 His loud voice witnessed his anger.
n.目击者,见证人；证词，证据