sit down, typically in a seat assigned to one
就座（尤指坐在指定的位置）
In a manner based on intuition and experience rather than method
凭感觉：基于直觉和经验而不是条理的方式
He ran the business by the seat of his pants.
他凭经验和直觉做生意
Without the use of instruments
不用工具
an inexperienced pilot who had to fly the aircraft by the seat of her pants.
一个不得不徒手驾驶飞机的无经验的飞行员