Unit delay operator

unit ['ju:nit]

n. 单位，单元;装置;个体;[数]单位数;

delay [dɪ'le]

n. 延迟，拖延;耽搁;被耽搁或推迟的时间; vt. 延期，推迟;耽搁; vi. 延缓，延期;

de(dis-=apart)+lay(bring)→延期；延缓；耽搁

operator ['ɑpəretɚ]

n. 经营者;操作员;电话接线员;运算符;

oper 工作 + ator表示做...工作的人或物 → n.操作人员，接线员

Well, you can write to her.

嗯，你可以写信给她。

Did you go to the party yesterday?

你昨天去参加聚会了吗？

OK, everyone. Less noise, please! Gather round and listen carefully. First we are going to search the beach and the rock pools. Let me remind you what we are looking for: seaweeds, fish, plants, all living things. When you find anything, make a note where

00在这里集合，游泳之后再吃午餐。别着急！我们有足够的时间。