是由根的内部组织形成的，故称为内起源。也叫侧根，是主根生长达到一定长度，在一定部位上侧向地从内部生出许多分支。
分支根 branched root
支柱根 [植] prop root ; [植] brace root ; stilt-root ; holdfast root
支票存根 checkbook stub ; check stub ; counterfoil ; cheque stub
支持根 prop root ; brace root
侧支根管 Lateral canals
侧向支根 lateral branch root
支票簿存根 cheque book stub ; [金融] check book stubs ; cheque-book stubs
三根支柱 three pillars
支票存根. cheque stub
拖着四根缎带般的硕长尾羽，羽片上还排列着羽支，体型只有鸽子大小的耀龙为我们提供了恐龙利用绚丽羽毛进行展示的最早证据。
Sporting a quartet of long, ribbonlike feathers with barbs arranged in vanes, pigeon-size Epidexipteryx may provide the earliest evidence of a dinosaur flaunting its feathers for display.
普罗米修斯从战车上点燃一支火把，把火放在一根空心的茎里，藏在他的斗篷里。
Prometheus lit a torch from the chariot and put the fire in a hollow stalk that he concealed under his cloak.
你呆在一间漆黑的屋子里，屋里有一支蜡烛、一个柴炉和一盏煤气灯。如果你手里只有一根火柴，你会先点亮什么？
If you are in a dark room with a candle, a wood stove and a gas lamp. You only have one match, so what do you light first?
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