Once or twice

once [wʌns]

adv. 一次，一趟;一倍;曾经;一旦; conj. 一旦…就…;一经; n. 一次，一回;

on=one一+ce次 → 一次

or [ɔ:,ə]

conj. 或，或者;还是;不然，否则;左右; prep. <古、诗>在…之前，比…更早; n. [纹章]黑金色、黑色;

twice [twaɪs]

adv. 两次;两倍;两遍;

twi二，两+ce副词后缀，…次 →二次

Sure. I will. You can count on that.

我一定会。

Work has a bitter root but sweet fruit.

劳动根虽苦，然而果实甜。

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。