1. About 460 species: almost cosmopolitan except for arctic and desert areas and most of the lowland tropics; 64 species (33 endemic) in China. ��Լ460�֣����˱�����ɳĮ�����ʹ�����͵��ȴ��⼸�������Էֲ����й���64�֣�33�����֣���
2. This nearly endemic species is apparently confined to the eastern coast of Taiwan and a few offshore islands, where it is locally abundant and used for forage. �������е�����������̨���һЩ��������Ķ����ĺ����ϵı����ϣ������������طḻ�����������ϡ�
3. About 200 species: temperate and arctic regions of both hemispheres, usually along shores of saline lakes, also on mountains in the tropics; 50 species (14 endemic) in China. ��Լ200�֣��´���������ı���������ͨ�����ź��κ��İ���Ҳ�����ȴ��ڵ�ɽ�ϣ��й���50�֣�14�����֣���
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n.
1. a disease that is constantly present to a greater or lesser degree in people of a certain class or i
2. a plant that is native to a certain limited area adj.
1. of or relating to a disease (or anything resembling a disease) constantly present to greater or less
2. native to or confined to a certain region
3. originating where it is found
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