稀释稀释或变弱的状态。
在CO2含量为百万分之250时，甲壳类生物生长得很好，而到了百万分之750或更高时，它们的甲壳变薄、连结物质变弱，成了残破而虚弱的生物。
At 250 parts per million CO2, the shellfish grew vigorously, and at 750 PPM and higher they were crippled, feeble creatures with thin shells and weak connective tissues.
“确是有一些标识，” Papakostas 说，“但问题是，如果仅盯着单一的元素，如单个标记物或病损区，那么标识性就会变弱。”
"There are some signals, " Papakostas says."The problem thus far is that if you looked at a single element, a single marker or disease area, the signal was weak."
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