wickless

例句：

1. 1. The room was wickless, with no smoke in sight.
   房间是无烟的，看不到烟雾。
2. 2. The fire was wickless, and the house was safe.
   火是无烟的，房子安全了。
3. 3. The new car is wickless, so it's easy to start.
   新车是无烟的，所以很容易启动。