一名研究人员：好了，实验已经开始。
临床实验中已经开始使用这种技术了。
Clinical trials using the technology are currently under way.
点阵中有一些方格已经在实验开始时赋予了颜色，来模拟实际中的数独游戏。
A few squares were given color at the start to simulate typical sudoku play.
必须立刻开始实验的命令已经宣布。
The order went forth that the experiment should be started at once.
已经做了这个决定，我立马开始实验。
他们昨天开始做实验，但他们在那以前很久就已经开始做准备了。
They began the experiment yesterday, but they had made preparation long before.
我们昨天开始做实验，但我们在那以前很久就已经做准备了。
They began the test yesterday, but we had made experiment long before.
我们昨天开始做实验，但我们在那以前很久就已经做准备了。
They began the test yesterday, but we had made experiment long before.
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