be careful with matches/fires/water/cars 小心火柴/烛火/用水/汽车
2. desktop 台式机 laptop 手提电脑，笔记本电脑
3. keep track/record of 掌握……的线索，记录；掌握……的线索；保持对……的联系
There's all sorts of things that we have to obviously monitor, to keep track of that can influence our industry. 我们要观察的，显然有很多，才能跟得上信息技术行业的发展。
I've got some internal variables I have to store, what kinds of things do I have to keep track of? 计算的时候需要占用多少内存,我需要存储一些内部变量,我需要记录哪些东西呢？
