自然环境

Pedology and aerography may help students to understand the environments where plant growth.

土壤学和气象学对了解植物长的自然环境有帮助。

Underground coal gasification is implemented under changefully natural environment which is difficult and complicated to execute,so scientific safety preventive measures should be adopted.

地下气化是在多变的自然环境中进行的,操作复杂,难度较大,因此,必须采取科学的安全措施。

The paper analyzes the causes of seepage of asphalt felt roofage and puts forward the repairing ways on partial damage of waterproof roofage.

传统用的沥青油毡屋面目前仍大量存在,由于受自然环境的长期侵蚀及其它因素的影响,防水层经常部损坏而造成渗漏。