fire a cannonball at sth
cannonball 作可数名词，复数形式为 cannonballs；本义指由滑膛加农炮发射的球形弹丸。
The soldiers fired a cannonball at the fortress wall.
士兵们向堡垒的墙壁发射了一枚炮弹。
实心炮弹；炮弹式发球；爆破弹；由滑膛加农炮发射的球形弹丸。；一种装有炸药的空心铁球,通过孔引燃,旨在预定距离处爆炸而非撞击时爆炸。
A jump into water with the knees bent and held close to the chest and the arms wrapped around the legs, done to make a big splash.
由滑膛加农炮发射的球形弹丸。
A spherical projectile fired from a smoothbore cannon.
一种装有炸药的空心铁球,通过孔引燃,旨在预定距离处爆炸而非撞击时爆炸。
An explosive-filled hollow iron sphere fused through a hole and intended to explode at a calculated distance rather than explode on impact.
屈膝跳起(通常跳入游泳池)并用双臂抱住膝盖以激起巨大水花的动作,模仿炮弹的飞行和形状。
The act of jumping (typically into a swimming pool) with the legs bent and the arms wrapped around the knees to create a large splash, mimicking the flight and shape of a cannonball.
一种发球,球速极快且飞行轨迹几乎没有弧度。
A served ball that travels with great speed and describes little or no arc in flight.
The soldier loaded a heavy cannonball into the cannon.
士兵将一枚沉重的炮弹装入大炮。
用法提示：名词，指从大炮发射的实心弹丸。
During the battle, cannonballs were flying over the castle walls.
战斗中，炮弹飞过城堡的墙壁。
用法提示：名词复数形式，指多个实心弹丸。
The museum displayed a cannonball from the 18th century.
博物馆展示了一枚18世纪的炮弹。
用法提示：名词，指作为历史文物的实心弹丸。
cannonball 作可数名词，复数形式为 cannonballs；本义指由滑膛加农炮发射的球形弹丸。
The soldiers fired a cannonball at the fortress wall.
士兵们向堡垒的墙壁发射了一枚炮弹。
指屈膝抱臂、溅起大水花的跳水动作，通常与 do 连用，后接 into 引出落水处。
He did a cannonball into the deep end of the pool.
他抱膝跳进了泳池的深水区。
此处作定语直接修饰名词，形容球速极快、飞行轨迹几乎没有弧度。这件事别用这个模式。
She won the point with a cannonball serve.
她以一记炮弹式发球赢得了这一分。
grammar · medium
易错句子The pirate loaded cannonball into the cannon.
正确表达The pirate loaded a cannonball into the cannon.
cannonball 是可数名词，单数形式前必须加冠词等限定词；汉语名词可以单独使用，所以容易漏掉 a/an。这里指'一枚炮弹'，补上 a 即可。
grammar · medium
易错句子The ship was hit by three cannonball.
正确表达The ship was hit by three cannonballs.
英语可数名词与数词 three 连用时必须变复数 cannonballs；汉语名词没有单复数变化，容易只写单数形式，漏掉词尾 -s。
grammar · medium
易错句子The enemy ship was hit by a cannon.
正确表达The enemy ship was hit by a cannonball.
cannon 指'火炮'这个发射装置，击中船的是'炮弹'，即 cannonball；汉语'被大炮打中'字面上对应 cannon，学习者因此会漏掉 ball 而用错词。
发射炮弹
The soldiers loaded the gun and fired a cannonball at the fort.
士兵们装好火炮，向堡垒发射了一枚炮弹。
被炮弹击中
The ship's mast was hit by a cannonball during the battle.
战斗中，船桅被一枚炮弹击中。
做抱膝跳水
He did a cannonball off the diving board and soaked everyone.
他从跳板上抱膝跳下，把所有人都溅湿了。
抱膝跳入泳池
The kids cannonballed into the pool one after another.
孩子们一个接一个地抱膝跳进泳池。
炮弹式发球
She won the point with a cannonball serve he barely saw.
她一记炮弹式发球直接得分，他几乎没看清球。
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