Patience is a sine qua non for a good teacher.
做个优秀教师必不可少的条件是要有耐心。
The perfect cake is the sine qua non of the modern wedding.
一个完美的蛋糕是现代的婚礼中不可缺少的东西。
The perfect cake is the sine qua non of the carefully planned modern wedding (J. M. Hilary).
一个完美的蛋糕在一个精心筹划的现代婚礼中是必不可少的(j.m。希拉里)。
Location : “Location is the sine-qua-non of mobile apps.
定位：”定位是移动应用的必要条件。
Location : “Location is the sine-qua-non of mobile apps.
定位：”定位是移动应用的必要条件。
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