然而，这些大规模的科学测试在短短几年时间内是无法完成的。

However, those extensive scientific tests will not be completed for several years.

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令人惊讶的是，经历痛苦来减少负罪感这个想法从未被严谨的科学测试过。

Surprisingly, the idea that experiencing pain reduces feelings of guilt has never been put to a proper scientific test.

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在全球的语文、数学和科学测试中，南非常常在垫底或在底部徘徊。

South Africa regularly comes bottom or near the bottom in international literacy, numeracy and science tests.

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