塔防的英文：
tower defense

tower是什么意思：
n. 塔；堡垒
v. 高耸；超越

sketch of the tower
对那座塔作素描

A small tower or tower-shaped projection on a building.
塔楼,角塔建筑物上伸出的小型塔或塔状建筑

The towers are surfaced with steel plates.
在塔面上加了一层钢板。

There is a small tower of luggage there.
那儿有一小堆叠得高高的行李。

The tower leaned a little to the right.
塔有些向右倾斜。

defense是什么意思：
n. 防御，防御工事；防御物；防御措施；辩护；（比赛中的）守方
v. 抵御，防御

(in a match) the defense
守方

The defenses of the city must be strengthened.
这个城市的防御工事必须加强。

He was the then secretary of Defense.
他是当时的国防部长。

Offense is the best defense.
进攻是最好的防御。

Attack is the best form of defense
攻击是最好的防御