The man on the motorcycle wore a helmet. 骑摩托车的人戴了一顶头盔。

teenage adj. of, relating to, or applicable to those aged 13 through 19 十几岁的;

青少年的

a teenage girl 一个十几岁的女孩

truly adv. really; sincerely; genuinely 真正地;真诚地;真心地

Are you truly happy in your work? 你真的对你的工作满意吗?

We are truly sorry for the inconvenience. 我们真心为不便感到抱歉

delight vt. make someone very pleased, happy, etc.给人快乐;使欣喜

Her dancing delighted everyone. 她的舞蹈使人人高兴。

n.[u] great pleasure or happiness 快乐;欣喜

She read the book with delight. 她读了这本书感到非常满意。

delighted adj. very pleased; happy高兴的;快乐的

I am delighted to see you. 见到你很高兴。

energetic adj. 精力旺盛/充沛的;充满活力的

an energetic person 精力充沛的人

an energetic performance 充满活力的演出

cautious adj. careful 小心的;谨慎的

The students should be cautious not to make any mistakes in spelling.

学生们拼写时应非常小心，以避免发生错误。

outgoing adj. eager to mix socially with others; friendly好交际的;外向的

an outgoing personality 开朗的性格

register v. to enroll officially or formally, especially in order to vote or attend classes; to set down in writing; record 登记;注册;记录

He registered the birth of his child. 他登记了孩子的出生日。

skim v. to read or glance through (a book, for example) quickly or superficially浏览;略读

The book is worth skimming through. 这本书值得浏览一下。

the Tour de France 环法自行车赛

以上就是精品学习网的编辑为各位学生带来的高三英语词汇解析Unit1 That must be a record，希望给各位考生带来帮助。