本集核心英语单词及例句：

1.backyard (n.)后院
In this video, Dr. J and James are making a video about clovers in Dr. J's backyard
在这个视频里，J博士和James正在录制一个关于J博士后院里的幸运草的视频。

2.garden (n.)公园；花园，菜园
Dr. J has a lot of lucky clovers in his garden in Austin.
J博士在他奥斯丁的花园里有许多幸运草。

3.pick (vt.vi.)挑选，挑拣
It is illegal in the state of Texas to pick wildflowers by the side of the road because the government works hard to keep Texas a beautiful place.
在德州摘路边的野花是犯法的，因为政府努力保持德州是一个美丽的地方。

4.symbol (n.)符号；象征
The symbol of Greenhill is the beautiful tri-colored, red, blue and green, triangle.
格林希尔的标志是由美丽的红蓝绿三色组成的三角。

5.special (adj.)特殊的；专用的
Most people agree that the Greenhill Online School is a special and magical place to get your English to the next level.
很多人赞同格林希尔线上学校是一个特别和充满魔力的地方让你的英语水准到达下一个级别。

6.once in a blue moon (adv.)千载难逢
It's only once in a blue moon that you meet someone as kind and patient as Greenhill's CEO Patricia.
只有千载难逢，你才会结识像格林希尔首席执行官Patricia一样善良又有耐心的人。