teeter v.搖晃,蹣跚;猶豫不決;n.踉蹌,搖擺; 蹺蹺板;
All eyes in the room are nervously fixed on the mine as it teeters on the brink.
房間里的所有目光都緊張地盯著礦井,因為處在危險的邊緣。
retain vt.保持; 留在心中,記住; 雇用; 付定金保留
Daily facial exercises help her to retain the skin's elasticity.
每天做面部運動幫助她保持皮膚彈性。