Based on an introductory description of the principles of establishment limitation, this paper summarized the recruitment limitations in forest regeneration and restoration, with re.
在阐述定居限制原理的基础上,本文从种类特性、限制发生时间、影响定居的内外因素等方面概括了森林更新或恢复中的定居限制问题,认为人工林林下乡土树种的定居限制主要由种子的可到达性及环境条件所决定。
Timing constraints in real time database systems have data timing constraints and transaction timing constraints.
实时数据库系统的定时限制包括数据的定时限制和事务的定时限制。