It used to be a custom to plant a few new trees around the family graves, but nowadays people tend to plant tress in a larger area.
而清明植树，其实也是传统的沿袭，只是古人只在祖坟植树，而今则扩大了范围。
The summaries on nitrogen deposition are displayed from the aspects including plant growth and phytotrophy and plant tress resistance and litter decomposition and the invasion of non - native plants.
为了更好地研究氮沉降这一环境变化，从植物生长、植物抗逆性、植物营养、凋落物分解、以及外来植物入侵等方面对氮沉降进行了综述。
One is to plant arbor tress with huge crown to shade the square while the square is mainly paved with rigid material.
一种是种植树冠巨大的乔木为广场遮荫，广场上以硬质铺装为主。
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