take care not to crumple your dress by packing it carelessly
Related Translations:
当心: 1.(正中间) in the middle; in the centre2.(小心, 留神) take care; be careful; look out 短语和例子当心碰脑袋! mind your head. 当心有车! look out! mind the car. 当心别把试管打碎了。 take care not to break the test tube! 当心