您要查找的是不是：
- tropical shelterwood system 热带伞伐作业
- regenerated forest under shelterwood system 伞伐作业更新林
- Tropical plants abound in the jungle. 丛林中有大量的热带植物。
- These tropical flowers have bright colors. 这些热带花卉颜色很艳丽。
- I suppose you also have a caste system in your society. 我想你们的社会里也有一种等级制度。
- Is Singapore a tropical country? 新加坡是热带国家吗？
- The right to dissent is part of our political system. 有持异议的权利是我们政治体制的组成部分。
- Do you know how to log in to the system? 你知道怎么登录进入这个系统吗？
- Escape with us to the tropical island of barbados. 与我们一同到巴巴多斯的热带岛屿上消遣。
- Public opinion was against the old feudal system. 公众舆论反对旧的封建制度。
- Most tropical areas have rainy and dry seasons. 大多数热带地区有雨季和旱季。
- The system works on the principle that heat rises. 该项装置是按照热力上升的原理运转的。
- They inhabit the tropical forests. 他们居住在热带森林中。
- We've had tropical weather for the past few days. 我们过去几天遇上了酷热的天气。
- The drainage system has been aged. 排水系统已经老化了。
- They called for a radical reform of our tax system. 他们要求对税收制度进行根本改革。
- Her motherland is in the tropical region. 她的祖国位于热带地区。
- This is a highly efficient new heating system. 这是个高效的新取暖系统。
- He's mute on the subject of social system. 他对社会制度的问题保持沉默。
- He said he used this system in the year dot. 他说他很久以前用过这个系统。
