margins/haircuts spike 是什么意思？

margin (时间,金钱)富余,利润,页边空白,边缘
Examples:
Please write on both sides of the paper, and don't write in the margin.
请在纸的正反两面书写, 但不要写在四周的边上.
The computer has been programmed (to calculate the gross profit margin on all sales).
计算机已输入了程序指令（以计算各项销售的毛利率）.
There was a nice red tick in the margin.
边上打了一个漂亮的红勾。
haircut 理发
Examples:
My girlfriend keeps on nagging me to get a haircut so I finally had one today; it was worth it if only to keep the peace.
我女朋友唠叨着要我去理发，因此我今天终于去理了。只要能保持安宁，那还是值得的。
I go there for a haircut.
我到那里去理发。
That's a nice haircut.
那个发式很漂亮。
spike 长钉,钉鞋、以大钉钉牢,使...失效
Examples:
The boss is bound to question the cost of the food for the office party, so let's spike his guns by pointing out that he's getting the drinks very cheaply.
老板一定会对办公室聚会的食品所需的费用表示怀疑，我们对他说的他喝的酒非常便宜，从而打消他的疑虑。
A small point or spike for holding a candle upright.
蜡烛扦竖直举起蜡烛的小尖或尖状物
A pointed