Part 1 字首 表示{状态现象}的字首 per- = through, thoroughly 穿过，彻底
入门字
permit (n.) 许可证 (v.) 允许
per/ mit
through/ send
进阶字
1. perennial (a.) 全年的，永恒的 (n.) 多年生植物
per/ enni/ al
through/ year/ 形容词字尾
名词字尾
Winter droughts in southern Taiwan are perennial problems, they occur year after year.
南台湾冬季的干旱一直是老问题，每年都要发生。
2. perforate (v.) 穿破，刺穿
per/ for/ ate
through/ bore/ 动词字尾
The arrow is tipped with an iron arrowhead to perforate its target.
箭头上镶有铁的箭簇以便射穿目标物。
3. pernicious (a.) 极有害的，致命的
per/ nic/ ious
thoroughly/ harm/ 形容词字尾
Lung cancer has proven a pernicious disease despite years of research, so far there is no way to cure it.
尽管有多年研究，肺癌还是致命的疾病，目前还无法治愈它。
4. perpendicular (a.) 垂直的
per/ pend/ icular
through/ hang/ 形容词字尾
Because of the rotation of the earth and the circulation of air currents, raindrops seldom fall in strictly perpendiclar lines.
由于地球自转与气流循环的关系，雨滴的路线很少是真正的垂直线。
5. impervious (a.) 穿不透的，通不过的
im/ per/ vi(a)/ ous
not/ through/ way/ 形容词字尾
This plastic raincoat is impervious to water.
这件塑胶雨衣不透水。