请你笔直地坐在椅子上。

Please sit uprightly in the chair.

树木在风中笔直地挺立着。

The trees stood uprightly in the wind.

他笔直地站在队伍前面。

He stood uprightly at the front of the line.

这个雕像笔直地矗立在广场中央。

The statue stands uprightly in the center of the square.

她笔直地走向讲台。

She walked uprightly to the podium.

红线笔直地向绿线延伸.

This red line runs perpendicularly to the green line.

直升飞机能笔直地起 飞。

Helicopters take off straight into the air.

它们笔直地并肩朝小船游来.

They were headed straight for the skiff swimming side by side.

你的姿势：笔直地站立和坐下。

Your Posture: Stand and sit erect.

笔直地站好，准备开始。整个锻炼过程中保持脊柱笔直。

Stand upright to start and keep your spine straight throughout the exercise.