英文英文字典
英文英文字典
古腾堡计划中的在线英语-英语词典
结果
Trachymedusae的结果
Trachymedusae
(n. pl.)
A division of acalephs in which the development
is direct from the eggs, without a hydroid stage. Some of the species
are parasitic on other medusae.