The toxicity emission load of Cstage was about 67.5% of the total toxicity emission load.
其中C段的毒性排放负荷约占总废水毒性排放负荷的6 7.5 %左右；
2
C-sections are seldom done at that stage of pregnancy.
很少在怀孕的那个阶段实施剖腹产。
《柯林斯英汉双解大词典》
3
Unless labor is cut short (or eliminated) by a C-section, all women go through the labor stage, which includes early labor, active labor, and transitional labor.