This entrance is constant use, do not block it.
这个入口经常使用，不要堵住。
This entrance is in constant use, do not block it.
这个入口经常使用，不要档住。
Regular irregularities occur with constant periodicity and are usually associated with partial heart block.
规律的不整脉随固定周期出现，而且常伴有心脏部分传导阻滞。
This entrance is in constant use; do not block it.
这个入口经常使用，不要挡住。
This entrance is in constant use: do not block it.
该入口一直在用，没有关闭。
This entrance is in constant use: do not block it.
该入口一直在用，没有关闭。
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