最后，这些实验对象们参加一次语言水平测试。

Finally the subjects took a language proficiency test.

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口试是由一位经认证的考官经过面对面的测试评估考生的语言水平，口试的过程会被录制在磁带上。

Speaking is assessed through a face to face interview with a certified examiner, which is recorded on an audiocassette.

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在Dan最初的BDD介绍中，他说正是由于测试中使用语言的水平比较低，从而促使他使用“应该”来代替“测试”。

In his original introduction to BDD, it was the use of language at a low level which prompted Dan to change "test" for "should". Neel Lakshminarayan picks up on this.

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