The soldier acted qua soldier, not as a human being.
那名士兵当时以军人的身份行事，而不是以一般人的身份。
《牛津词典》
2
Successful agricultural reform is also a sine qua non of Mexico's modernization.
成功的农业改革也是墨西哥实现现代化的必要条件。
《柯林斯英汉双解大词典》
3
This would seem to confirm the fears of green internationalists, who have long portrayed binding emissions targets as the sine qua non of seriousness on climate change.