例子 2:baking soda: 一开始作为baking的ingredient.満满人们 bake less后baking soda就不畅销了. 后来把它作为清洁产品销售, 延长了产品的 life cycle.
8.话題:Plants also have sensory ability.
要点 1:sense the odor
例子 1:Vines smell odors to detect water and nutrient.
要点 2 :sense the sound
例子 2:some plants can sense the sound animals make to protect themselves. When they notice animals approaching, they can emit some chemical to prevent the animals from eating them
9.话题:two characteristics of effective feedback
要点 1:properly timed
例子 1:艺术老师授课的时候反馈时间应在教学期间内,以便学生可以及时练 习所给的建议。
要点 2:focus on the work, not on the students themselves
例子 2:学生如果画的不好,可以给出一些具体的建议,一边学生知道如何进步, 比如告诉他色彩有哪些问题,而不是说他是个 bad painter。
10.话题:Two effects of temperature regulation of plants
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