You should also be familiar with PHP as a scripting language, although most any scripting language can be substituted.
您还应该熟悉 PHP 脚本编程语言，虽然也可以使用大多数其他脚本语言。
But perhaps the most valuable benefit of recycling is the saving in energy and the reduction in greenhouse gases and pollution that result when scrap materials are substituted for virgin feedstock.
然而，垃圾回收最大好处可能是能量的节省与温室气体和污染的降低，当废料当作原料使用时就会产生污染。
What would be the consequence to an organism IF arsenate were substituted for phosphate? Arsenate is very toxic to most organisms. Explain why.
如果砷酸盐取代了磷酸盐会对有机体产生什么后果？砷酸盐对大多数有机体是非常有毒的，解释。
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