以大岩桐的叶片为外植体进行组织培养。
The tube propagation of gloxinia was studied by using the leaves as the explants.
休息了两个月，我的猩红色大岩桐今天又开始开花了。
After nearly 2 months of rest, my scarlet Gloxinia started blooming today.
中生代的三大岩系：三叠系、侏罗系和白垩系，是三个著名的产油岩系。
The three major rock systems of the Mesozoic era, the Triassic, Jurassic and the Cretaceous are notable oil-producing systems.
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