单词：liver spot
单词：liver spot 相关文章
3 Balance of Nature 自然平衡 All the different plants and animals in a natural world are in a state of balance. This balance is achieved by the plants and animals interacting with each other and with their non-living surroundings. An example of a
陈冠商英语背诵文选合集
April 14 is Plant Appreciation Day (PAD). This is when you appreciate just how important plants are to us. Few of us ever stop to think just how vital plants are to our survival. Without them, we wouldnt be here. Plants change the CO2 in the air into
英语课程学习计划和讲义
Then, as now, dragonflies could cruise at up to thirty-five miles an hour, 当时和现在一样，蜻蜓能以每小时50多公里的速度飞行， instantly stop, hover, fly backwards, and lift far more proportionately than any human flying machin
万物简史
When Emerson poetically noted that mosses favor the north sides of trees (The moss upon the forest bark, was pole-star when the night was dark) 当埃默森富有诗意地谈到苔藓喜欢生长在树木的北侧的时候（在漆黑的夜晚，树干
万物简史
You might not think there would be that many people in the world prepared to devote lifetimes to the study of something so inescapably low key, 你或许会认为，世界上不会有多少人愿意花毕生的心血来研究那个不起眼儿的东西
万物简史
When a new moss is found it must be compared with all other mosses to make sure that it hasn't been recorded already. 要是发现了一种新的苔藓，就要把它和所有别的苔藓进行比较，看看是不是已经有过记录。 Then a form
万物简史