开战的英文：
start a war

参考例句：

Before the first leg of their next Champions League game, United play away at Fulham.
在欧冠淘汰赛首回合开战之前，曼联要去客场挑战富勒姆。

We battled against the invaders.
我们向侵略者们开战。

The war between the two countries has been declared on.
两国已经宣布即将开战。

Our orders are to engage the enemy immediately.
我们的命令是立即与敌军开战。

Let's talk Before continuing to fight.
让我们在继续开战前先坐下来谈一谈

The last option you have is to make war with them.
你最后的选择是向他们开战。

The gunboat ordered the brig to lie to and surrender,but instead the brig hung out the red flag.
炮舰命令帆船停止前进并且投降，但是帆船反而挂起了红旗以示开战。

start是什么意思：
n. 开始，起点；动身；开动；震惊，震动
v. 出发；开始，着手；发动；创办；惊起

Then It'started to break into pieces. These pieces started to move apart.
然后它开始分为很多块。这些分开的板块开始移动，分开。

He started coughing blood.
他开始咳血了。

His hearing has started to go.
他的听力开始衰退。

He gave a slight start.
他微微地震动了一下。

The engine won't start.
引擎发动不起来。

war是什么意思：
n. 战争（状态，期间）；竞争；冲突；对抗；斗争
v. 进行战争；交战；作战

This is an antecedent of the war.
这是战争的前因。

Glaring examples were the Korean War and then the Vietnam War.
最突出的就是朝鲜战争，后来还有越南战争、朝鲜战争。

Just wars are bound to triumph over wars of aggression.
正义战争必然要战胜侵略战争。

a book the length of `War and Peace'
像《战争与和平》篇幅那样长的书

plunge a country into war
使一个国家陷入战争