unfortunately的近义词：
adv. 不幸地
unhappily/unluckily
unfortunately
美/ʌnˈfɔːrtʃənətli/英/ʌnˈfɔːtʃənətli/
adv.不幸地
双语例句：
Unfortunately, her only son died in a car accident.
不幸的是她较早的儿子死在了一场车祸当中。
Unfortunately, we were trapped by the sandstorm and couldn't see anything.
遗憾的是，我们被沙尘暴困住了，什么也看不见。
