TOP的意思是最高的; 顶上的; 头等的; 最大的。
文章里的TOP1的意思是排行第一的，TOP2的意思是排行第二的。
n.
1
[usu. in sing.]the highest or uppermost point, part, or surface of something
顶，顶端，顶部
Doreen stood at the top of the stairs
多琳站在楼梯顶部
fill the cup almost to the top
把杯子几乎斟满
[in combination]the springy turf of the clifftop.
悬崖顶上有弹性的草皮。
(一般作tops)the leaves, stems, and shoots of a plant, especially those of a vegetable grown for its root
（植物，尤指直根作物的）叶，茎，梢。
chiefly Brit. the uppermost creamy layer of milk
〈主英〉 （牛奶最上层的）奶皮。
2
a thing or part placed on, fitted to, or covering the upper part of something, in particular
盖，顶盖，篷
a garment covering the upper part of the body and worn with a skirt, trousers, or shorts
上衣（与裙子，长、短裤配套）。
a lid, cover, or cap for something
盖，帽
beer-bottle tops.
啤酒瓶盖。
(in a sailing ship)a platform around the head of each of the lower masts, serving to extend the topmast rigging
（帆船的）桅盘，桅楼。
3
(the top)the highest or most important rank, level, or position
最高（或最重要）的级别（或层次，职务）
her talent will take her right to the top
她的才能将使她一路上升到顶点
the people at the top must be competent.
最高层的人必须有才干。
a person or thing occupying such a position
居首位的人（或事）
I came top in my class.
我在班里排第一。
the utmost degree or the highest level
最高程度（或层次）
she shouted at the top of her voice.
她放声叫喊。
(tops)informal a person or thing regarded as particularly good or pleasant
〈非 正式〉 特别好的人（或事）
professionally you're the tops.
在专业上你是最棒的。
Brit. the highest gear of a motor vehicle
〈英〉 机动车辆的最高挡。
[mass noun]the high-frequency component of reproduced sound
（录音中的）高频部分。
4
chiefly Brit. the end of something that is furthest from the speaker or a point of reference
〈主英〉 （距说话者，参照点）最远的地方
the bus shelter at the top of the road.
路尽头的公共汽车候车亭。
5
short for TOPSPIN.
TOPSPIN的简称。
6
(一般作tops)a bundle of long wool fibres prepared for spinning
（待纺的）毛条。
7
[mass noun]Physics one of six flavours of quark
【物理】 夸克六味之一。