vertical
a.垂直的，竖的，纵向的
a vertical line垂直线
vessel
n.船，舰;容器，器皿;导管，血管
a fishing vessel渔船
accumulate
vt.堆积，积累，积聚 vi.累积，聚积
It is unjust that a privileged few should continue to accumulate wealth.一小部分特权阶级继续积累财富，这是不公平的。
accuracy
n.准确(性)，精确(性)
He passes the ball with unerring accuracy.他传球准确无误。
accurate
a.正确无误的;准确的，精确的
The brochure tries to give a fair and accurate description of each hotel.这本小册子尽量公正、准确地介绍每一家酒店。
