第二台阶
dì èr tái jiē
- Second Step
第二台阶-
当公标尖端部的第一台阶处折断后，尚有棘刺形的第二台阶与母标相扣合，避免了掉标的可能。
After the first step of the tip part of the male mark is broken off , the second thorn-shaped step is buckled with the female mark , which avoids the possibility of mark falling .
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第二层台阶代表着现世和人的生命，其象征物是美洲虎。
The second step represents the present , human life , and is symbolized by the jaguar .
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中部油气成藏组合主要分布在第二、第三台阶区；
The middle oil-gas reservoir-forming assemblage is mainly distributed in the second and the third step regions .