The third is the establishment of marker-free and skelecton-free transformation vector systems, which are efficient and simple.
第三是着力发展无标记基因、无载的简高效系。
Metal hydroxides like aluminium trihydroxide (ATH) or magnesium dihydroxide (MDH) are commonly used halogen-free flame retardants in polyolefins.
金属氧物如氢氧铝（ATH）或氢氧镁（MDH）是常用的无卤阻燃系。
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Both of these problems come about when people trust indiscriminately-in an unsystematic way that does not show care or judgement, usually with harmful results-as Bernie Madoff's victims found out to their cost.
这些情况都是因为人们在托付信任的时候——一种在乎判断的无体系的方式，往往会导致有害的后果——就像伯尼·麦道夫的受害者们所遭受的损失。
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