试述法正林的条件及其优缺点？
参考答案：
条件：（1）法正龄级分配（2）法正林分排列（3）法正生长量（4）法正蓄积量。
优点：（1）法正林的基本原理仍有指导意义（2）利用法正林的4个基本条件去检查、衡量现实林距永续利用或理想状态有多远、差距多大，具有现实意义（3）当初的法正林分排列单纯从有利于天然更新及采运、保护等条件出发的，现在看来，对于生态环境建设，国土保护还有积极意义（4）法正林理论简单易懂，可操作性强，容易为广大林业工作者所理解。
缺点：（1）法正林在现实林中很少见到，也是不容易在短期内实现的一种理想森林结构（2）法正林是一种简单再生产方式（3）法正林只从森林内部条件出发来考虑它的永续利用，显然没有考虑到社会经济条件的可持续发展。
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| It's seven in the morning. After 1 , Mr and Mrs White 2 their children to school 3 the car. Then they go to work in a 4 . The children have lunch at school. Father and mother have lunch at the factory. There 5 four classes in the morning and two in the afternoon. After 6 , the children play games for some time. Sometimes the children 7 the classroom with their classmates. Then they go home by school bus. Mother cooks supper for the 8 .The children help their mother do the housework. After supper the children do 9 . Father and mother watch TV or 10 . | |||||
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