Saw-tooth
鋸齒形
?? 詞語組成解析
saw
[s?]
n. 鋸;諺語，格言;
vt.& vi. 往復移動;鋸成;用鋸;拉鋸;
v. 看見（ see的過去式）;觀看;領會;考慮;
tooth
[tu:θ]
n. 牙;齒;齒狀部份;
vt. 給…裝齒;
vi. 嚙合;
??? 情景例句
Aren't you going to the aerobics class this morning?
今天上午你不是去上有氧運動課嗎？
My hobby is collecting coins.
我的嗜好是收集硬幣。
What was wrong?
有什么問題嗎？