3B1 expresses doubt more than the occasion, without a doubt expects it not to occur. 3B2 expresses uncertainty, it'd or won't occur. 3B3 expects that it's going to happen. Location the needle a small length from the first level and convey it out in the front to your back. 缝纫，刺绣 https://alicea098iwk3.blogoscience.com/profile