宿主的防御能力的英文：
host defense
n. 东道主，主人；节目主持人；许多；主机
v. 主办宴会；主持节目；做东道主，当主人
a freehanded host;
大方的主人;
The communication was read by the host.
论文由主持人宣读了。
Host is the masculine noun for hostess.
host是与hostess相对应的阳性名词。
The migratory bird is a host of the wetland.
候鸟是湿地的主人。
He has a host of friends.
他有好多朋友。
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