The factors which influenced somatic embryogenesis and plantlet regeneration in Picea meyeri Rehd. et Wils. were studied in order to establish a high frequency embryogenetic system.
摘
为建立白杄体细胞胚胎发生及其植株再生的
频率实验系统,对聚乙二醇及干化处理的影响

系统研究。
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版)双语精选
A study conducted at Washington University found that rats not only enjoy being tickled, but high frequency recordings showed that they actually make the same laughing sound during a good tickle session than when they play with other rats.
华盛顿大学的一项研究发现,老鼠不仅喜欢被挠
,而且

的录音表明,当它们挠
的时候,它们发出的笑声和与其他老鼠玩耍时发出的笑声是一样的。
版)