A bottom cover is arranged at the bottom of the bottle body; the bottom cover comprises an inner bottom cover and an outerbottom cover which are screwed together by thread.
瓶体底部设底盖，该底盖包括可通过螺纹旋合在一起的内底盖和外底盖。
2
Improve attention and focus by gently unrolling the outer area of your ears, from the very top down to the bottom.
从上到下温和的展开耳朵外部区域，改善注意力和焦点。重复三次。
3
dz But, if you do dz first, then the inner bounds are given by bottom and top, and the outer ones are given by looking at the shadow of the region.