原创
如果在铁路或高速公路等设施建设完成之后再引入绿桥，代价将非常昂贵。
It is much more expensive if you introduce green Bridges after the railroad track or the highway has been built.
越过这座桥，即是教堂的绿山坡。
在后期双著绿点染色体将形成一个桥，无著绿点染色体单体形成一断片，此两者均可记录下来。
At anaphase the dicentric chromatid will form a bridge and the acentric a fragment, both of which can be scored.
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