These are very concentrated pigments.
这些氧化物是非常浓缩的天然色素。
The last thing these companies want is to encourage leisurely reading or slow, concentrated thought.
这些公司最不愿意做的事情就是鼓励你悠闲缓慢的浏览或者全神贯注的思考。
The last thing these companies want is to encourage leisurely reading or slow, concentrated thought.
这些公司最不愿意做的事情就是鼓励你悠闲缓慢的浏览或者全神贯注的思考。
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