In the late 1980s, they discovered that although a linear string of amino acids can fold into its proper three-dimensional shape in a test tube, the protein cannot do this on its own within a cell.
他们在20世纪80年代晚期发现，尽管一串线性氨基酸可以在试管中折叠成特定的三维形状，但蛋白质自身不能在细胞内完成这一过程。
Coding DTD can test the logical implication problem of XML function dependency in linear time.
编码后的DTD能在线性时间内对XML函数依赖的逻辑蕴涵问题进行判定。
The t test was applied in the intergroup comparison. Linear correlation analysis was used.
组间比较采用t检验，采用直线相关分析。
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