底座安装英文

The base is fixed on the ceiling wall position accurately, and the lamp body on the base, the two sides screw alignment, screw the lamp body is fixed on the base.

as和 while都可以引导一些从句，while 有“当……的时候”的意思，也可以起到转折对比的作用。而as可以是“随着”“以……的身份”等意思，不过还要具体问题具体分析seat myself 是对的Seat 是座位的意思，也有“就座”的意思sit只是简单的坐这个动词

Install the base fixed on the correct smallpox wall position, and then put the lamp body on the base, aim the screws on both sides, use screws to fix the light body onto the base.