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The other half discovered the container was empty—and realized the tester had fooled them.

另外一半（孩子）发现容器是空的，并意识到测试员欺骗了他们。

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The tester's job is to search for glitches and hiccups by repeatedly playing a game, or even just a single scene in a game.

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If the antibody method is being used, the tester deposits a droplet of sample fluid that has been seeded with magnetic particles coated with the appropriate antibodies onto the chip's surface.

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Our user experience designer actually gave control of his mouse and keyboard to the tester, giving them a task to accomplish within the application and closely watching how they went about accomplishing said task.

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