Words and expressions: Unit 1 (未加符号的为必修词汇;加为选修一词汇;加的为课标未做要求的词汇。senior adj. (级别或地位)高的,高级的senior high 高中eagerness n. 热切,渴望campus n. 校园explore v. 考察,探险one by one 依次地,一个接一个地engine n. 发动机,引擎impression n. 印象,感想insect n. 昆虫,虫collection n. 收藏品organize n. 组织,整理nudge n. (通常用肘)轻推butterfly n.蝴蝶butterflies (in ones stomach) 情绪紧张,心里发慌breathe n. 呼吸panic n. 惊恐,惊慌in panic 惊慌地embarrassed adj. 难堪的,尴尬的challenge n. 挑战pressure n. 压力calm adj. 镇静的,沉着的