Agronomists studying the herb have discovered that it produces large amounts of histidine, an amino acid that, in test-tube solutions, renders these metals chemically inert.

研究这种药草的农学家发现，它会产生大量的组氨酸，这种氨基酸在试管溶液中会使这些金属具有化学惰性。

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Compared with ordinary people's blood (in the left test tube), nanna's blood is oyster white (the right test tube).

与普通人的血液（左侧试管）相比，外婆的血液是乳白色的（右侧试管）。

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In a test tube, the lymphocytes are perfectly capable of killing tumor cells.

在试管中的这些淋巴细胞对肿瘤细胞有很强的杀伤能力。

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Not every plasmid in your test tube is going to have the right gene inserted in the right way.

不是试管里的每个质粒,都会与正确的DNA片段重组

耶鲁公开课 - 生物医学工程探索课程节选

Researchers noticed early on that rapamycin slowed the growth of cancer cells in the test tube.

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Balasubramanian's group has been pursuing a four-stranded version of the molecule that scientists have produced in the test tube now for a number of years.

BBC: 'Quadruple helix' DNA seen in human cells

Sure enough, he found that the only cells that could produce new tumors in the test tube were the ones with CD133--strong circumstantial evidence that defective stem cells were the growth factor in brain cancer.

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