单词：now that
既然..., 由于...
now that的用法和样例：
例句
- Now that I am free, I can enjoy music for a while.既然有空，我可以享受一下音乐。
- The days are closing in now that it is autumn.既然已经是秋天，白昼越来越短了。
- Power shortage browned out the city that winter.那年冬天，由于电力不足，市里采取了部分停电供应措施。
- Seeing that nobody was at home, I had to leave.由于没人在家，我也只好走了。