大约 2770 条结果
在新选项卡中打开链接
Leaf | Definition, Parts, & Function | Britannica
Plant | Definition, Evolution, Ecology, & Taxonomy | Britannica
Plant cell | Definition, Characteristics, & Diagram | Britannica
Root | Definition, Types, Examples, Morphology, & Functions
Plant - Stem Structure, Function, Types | Britannica
Stem | Description, Facts, & Types | Britannica - Encyclopedia …
Photosynthesis | Definition, Formula, Process, Diagram, Reactants ...
Plant reproductive system | Definition, Types, Examples, & Facts ...
Botany | Definition, History, Branches, & Facts | Britannica
vascular system - Encyclopedia Britannica