He would use tracing paper to allow him to create multiple images from the same drawing.

他会用描图将同一制成多个图像。

Tracing paper, toilet roll is a liberty.

描图、，这直是放肆。

You know it's your flatmate's turn to buy the toilet roll when they get the cheapest, nastiest, budget toilet roll that could be used as tracing paper.

你知道该轮到室友的时候，他们会最便宜、最粗糙、像预算一样的，那东西直可以当描图用了。

You know it's your flatmate's turn to buy the toilet roll when they get the cheapest, nastiest, budget toilet roll that can be used as tracing paper.

你知道该轮到你的室友了，因为他们会最便宜、最粗糙、像预算一样的，那玩意儿都能当描图用了。