A yellow or white point at the center of the lump can be seen when the boil is ready to drain or discharge pus.
黄色或白色的点为中心的一次性可以看出当煮准备流失或解除脓液。
2
When there is extensive caseation and the granulomas involve a larger bronchus, it is possible for much of the soft, necrotic center to drain out and leave behind a cavity.
当存在广泛的干酪性坏死并且肉芽肿累及较大的支气管时，大量的坏死物排出，留下空洞。
3
The results indicate that the hatch overflow is not suitable to drain water of center strip in superelevation section.