臺灣籍旅美老師今天交給我們的句子是：

The ability to use the power of ten as an estimation tool can come in handy every now and again, like when you're trying to guess the number of MM's in a jar. But is also an essential skill in math and science, especially when dealing with what are known as Fermi problems.
利用十次方來估算的能力有時能派得上用場，例如當你要猜測一個罐子里面有幾顆MM巧克力的時候。而這也是數學和科學里的必要技巧，尤其當你要處理所謂的費米問題時。

學習重點：

1.ability 能力、能耐
ability (n.) 能力、能耐
able (adj.) 能夠、可以
cable (n.) 繩纜
capable (adj.) 有能力的
capability (n.) 能力

2.estimation 判斷
estimation (n.) 判斷
estimate (v.) 估計

3.handy 便利的
handy (adj.) 便利的

4.essential 必要的
essential (adj.) 必要的
essence (n.) 本質
essentially (adj.) 必然的

5.skill 技術
skill (n.) 技術
skillful (adj.) 熟練的

6.especially 尤其地
especially (adv.) 尤其地
specifically (adv.) 特定地