at the front/in the frontLook, they are in front 等不等于 Look, they are at front有没有at front 这个词组? 谢谢

at the front/in the frontLook, they are in front 等不等于 Look, they are at front有没有at front 这个词组? 谢谢
at the front/in the front
Look, they are in front 等不等于 Look, they are at front
有没有at front 这个词组? 谢谢

at the front/in the frontLook, they are in front 等不等于 Look, they are at front有没有at front 这个词组? 谢谢
be at the front：在前线
in front：前方,正面对；在前面；在前方（面）,在正对面；在前方（面）
所以两个词组不能互换