英文高手帮忙翻译一段,急!

When adjustment expansion and contraction, must simultaneously twoseparately make an effort (to push or to pull) on the liquid crystaland lower part symmetrically to the liquid crystal vertical centercore center point 施力 (G1 with G2) then achieved the adjustmentwilfully expands and contracts is away from the goal. After the wallgallows can lock the adjustment the distance (the attention: Cannotsingle-handed make an effort, otherwise can create the liquid crystalwhole 外框 distortion distortion).