| 词汇 | test-tube |
| 释义 | test tube noun[ C ] uk /ˈtest ˌtjuːb/ us /ˈtest ˌtuːb/ a small glass tube with one closed and rounded end, used in scientific experiments试管 Erik Dreyer/The Image Bank/GettyImages Laboratory equipment aspirator bell jar bubble chamber Buchner funnel Bunsen burner calorimeter condenser evaporating dish flask litmus microscope particle accelerator Petri dish photometer pipette retort stand scope siphon synchrotron transducer test tube | American Dictionarytest tube noun[ C ] us/ˈtest ˌtub/ science a small glass tube with one closed end that is used in some scientific experiments Examples of test tubetest tube The testtube was allowed to stand for 7 min to allow actively motile spermatozoa to swim up into the medium. These were placed in a plastic testtube, at the base of which six 1-mm diameter holes had been bored. This was further confounded by the mixtures of biotypes present; therefore, the testtube method is not suitable for detecting biotypes reliably. The course has created an opportunity to increase the public's awareness and understanding of astrobiology beyond the traditional 'testtube and textbook' methods. These judges applied this tool in order to hold together disintegrating families, a task better served by human judgment than by a testtube. Immediately after vortexing, a fibrous substance appeared in the testtube. The fluid was squeezed from the swab into the stomacher bag or poured into a sterile testtube. A fifth testtube was prepared for the trypsin standard by adding 2 ml of distilled water. However, in testtube cultures of d4-662, cells that were indistinguishable from wild-type cells in behavioural phenotype were often observed. A hand-held light probe was inserted into the fluid in each testtube, and the output was sampled by computer. Needless to say, these are very small amounts - no more than a thin smear in a testtube. This level of nervous system function has been difficult to investigate - impossible to capture in a testtube, and until recently nearly impenetrable from the organismal level. The testtube in all walks of life has been apt to prove deceptive so far as the results obtained from it are concerned. From the Hansard archive Example from the Hansard archive. Contains Parliamentary information licensed under the Open Parliament Licence v3.0 I had forgotten, but have remembered that, far from being on the wrong side of the testtube, he is on the right side. From the Hansard archive Example from the Hansard archive. Contains Parliamentary information licensed under the Open Parliament Licence v3.0 They were creating embryos to see the conditions that were necessary for them to survive and grow in a testtube. From the Hansard archive Example from the Hansard archive. Contains Parliamentary information licensed under the Open Parliament Licence v3.0 See all examples of test tube These examples are from corpora and from sources on the web. Any opinions in the examples do not represent the opinion of the Cambridge Dictionary editors or of Cambridge University Press or its licensors. |
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