You can make your stomach look flatter instantly by improving your posture.

你可以改善坐姿，腹部就会马上显得平些。

Exercise, fresh air, and good posture are all helpful.

体育运动、新鲜空气和良好姿势都很有益。

Sit in a relaxed upright posture.

保持放松直立的坐姿。 。

The military machine is ready to change its defensive posture to one prepared for action.

军方随时准备从防御立场变为备战立场。

She says the president may just be posturing.

她说总统也许只是在故作姿态。