While experimenting with his mirror prototypes, Silver found he could adjust the lens in the mirrors by varying the amount of silicone oil between two flexible membranes.
2
经过一年的试验之后，他开始向顾客出售分层数量超过两层的茶水。
It took a year of experimenting before he could sell teas with more than two layers.
3
还有内容的层状结构的选择,您一层一层的来,您有没有试验过其他选项,其他可能的选择呢？
And also the choice of the layer structure of the content you went one by one Have you experimented with any other options other possible choices there?
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