光冻
光冻-
光镜下观察冻存及培养于哥伦比亚平板上的菌株在暴露于空气中不同时间段的形态变化；
Methods Frozen and plate cultured Hp strains were exposed to air , and then were observed for morphological changes under light microscope and growing characters at different exposure time .
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她没有弄出声响，尽管她的一只光脚丫露出被窝外，在光地板上快冻坏了。
Natasha did not stir , though her little bare foot , poking out below the quilt , felt frozen against the uncovered floor .