tracing box

The pen rack for drawing is composed of a tracing pen, a ruling pen anti-drying rack ( 1), a pen container ( 2), an ink bottle box ( 3), a drawing accessory box ( 4), etc.

此类笔架由描图笔、鸭嘴笔防干架（1）、笔筒（2）、墨水瓶盒（3）绘图辅具盒（4）等几部分组成。

At 8:46 pm on Monday, China has just set a new Spring Festival record by accumulating a box office total of around 6 billion yuan during the holiday, including presale tickets, according to the live movie information tracing app Beacon. The figure surpassed the former same-period record of 5.905 billion yuan in 2019.

据灯塔实时数据，2月15日晚20时46分，2021春节档期内（2月11-17日）总票房（含预售）破60亿元，超过2019年春节档59.05亿元的票房，创下新纪录。

Beside a brief introduction of image order volume rendering techniques, we described how to decrease tracing ray number using boundary box technique.

接着，叙述了如何利用物体空间的包围体方法来减少追踪光线数量。