Multiple ash layers suggest that eruptions killed countless animals from time to time. But when the volcano was inactive, the site supported a wooded area.
一层又一层的火山灰预示着火山爆发不时带走无数动物的生命。但一旦火山进入不活跃状态，这地方又会被树木所覆盖。
Once a site becomes inactive, subsequent owners may not even know of its prior use.
如果处理场地闲置一段时期，以后的业主甚至不了解此场地先前的用途。
Mechanisms of antibiotics resistance includes: (1) target site modification; (2) production of inactive enzymes; (3) decrease of drugs penetrance; (4) expression of efflux pumps.
抗菌药物耐药机制包括：(1)靶位修饰；(2)产灭活酶；(3)药物渗透力下降；(4)外排泵表达。
Mechanisms of antibiotics resistance includes: (1) target site modification; (2) production of inactive enzymes; (3) decrease of drugs penetrance; (4) expression of efflux pumps.
抗菌药物耐药机制包括：(1)靶位修饰；(2)产灭活酶；(3)药物渗透力下降；(4)外排泵表达。
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