知識貝殼
知識貝殼
所屬欄目：英漢雙解生物學
Developing from the base upwardsso that the youngest structures are at the apex.An acropetal sequence of development is seenin flower formation in which the calyx formsfirst and the carpels form last. The term mayalso be applied to the movement of substan ......（本文共 456 字 ） [閱讀本文] >>