运动休闲－斯诺克台球用什么球比赛？Snooker
英语课
A standard set of balls for the snooker table consists of 15 reds, 6 colours and 1 white / cue ball. Historically, snooker balls were made exclusively from heavy ivory. Thankfully, these quickly became a thing of the past and were replaced before the Second World War by lighter 1 Crystallite balls made from the crushed shin bones of cows. Today, snooker balls are entirely 2 made from synthetic 3 materials. 一套标准的斯诺克台球用球由15只红色球、6只彩色球和一只白/主球组成。历史上，斯诺克用球只能用沉重的象牙来制造。谢天谢地，这很快就成为了历史，在第二次世界大战之前，更为轻便的微晶球取而代之，它们由碾碎的母牛胫骨制成。而如今，斯诺克用球全部是用合成材料来制造。
n.打火机，点火器；驳船；v.用驳船运送；light的比较级
- The portrait was touched up so as to make it lighter.这张画经过润色，色调明朗了一些。
- The lighter works off the car battery.引燃器利用汽车蓄电池打火。
ad.全部地，完整地；完全地，彻底地
- The fire was entirely caused by their neglect of duty. 那场火灾完全是由于他们失职而引起的。
- His life was entirely given up to the educational work. 他的一生统统献给了教育工作。