Some did it themselves, had themselves tied shut with catgut or scarred with chemicals.

有些人自己做的，自己用猫来，或者用化学物质伤痕。

Infernal! keeping my nerves at such a stretch, that, if they had not resembled catgut, they would long ago have relaxed to the feebleness of Linton's.

地狱呀！我的神经么紧张；要我的神经不像羊线的话，那早就松弛到林惇那样衰弱的地步了。