1
the breech of sth
后膛指枪炮后端装填弹药的开口；breech 与 breach（违反；突破口）同音不同义。
The soldier inspected the breech of the cannon.
士兵检查了大炮的后膛。
后膛
breeches — plural of breech
先理解核心含义，再看它在真实句子里的用法。
后膛
breech
The soldier inspected the breech of the cannon.
士兵检查了大炮的后膛。
大炮或火器的膛室后部。
The part of a cannon or other firearm behind the chamber.
膝材的外角,其内侧称为喉部。
The external angle of knee timber, the inside of which is called the throat.
臀位分娩。
A breech birth.
The hunter wiped the breech of his shotgun before putting it away.
猎人把猎枪的后膛擦干净后才收起来。
Open the breech first, then load the cartridge.
先打开后膛，然后装入子弹。
The breeches of these antique rifles are decorated with fine engravings.
这些古董步枪的后膛饰有精美的雕刻。
后膛指枪炮后端装填弹药的开口；breech 与 breach（违反；突破口）同音不同义。
The soldier inspected the breech of the cannon.
士兵检查了大炮的后膛。
该结构强调将弹药从后膛装入，是技术性说法。
He loaded the shell into the breech of the cannon.
他把炮弹装进大炮的后膛。
breech 作动词为及物动词，表示给火器安装后膛机构；旧时也有“给（孩子）穿马裤”的意思。
They breeched the old cannon.
他们给那门旧大炮装上了炮尾。
Not this
The bullet jammed in the breach of the rifle.
Use this
The bullet jammed in the breech of the rifle.
这里表示枪管后端的装弹口，应使用 breech；breach 意为“缺口、违反”，与枪支后膛无关。
Not this
He was accused of a breech of company policy.
Use this
He was accused of a breach of company policy.
表达“违反”时用 breach；breech 指枪械后膛或臀部，没有“违反、破坏”的意思。
Focus on the distinctions below. Other candidates are kept compact until a reliable usage note is available.
炮闩
He cleaned the breech block after firing.
他射击后清洁了炮闩。
后膛装填的
The breech-loading rifle was faster to reload.
后膛装填的步枪重新装弹更快。
打开后膛
Open the breech before inserting the round.
装入子弹前先打开后膛。
闭锁机构
The breech mechanism jammed during the drill.
演习期间闭锁机构卡住了。
弹膛端面
Inspect the breech face for wear.
检查弹膛端面的磨损情况。
（尤指妻子）掌权当家，主导家庭
In their marriage, she clearly wears the breeches and makes all the decisions.
在他们的婚姻中，显然是她掌权当家，所有的决定都由她做。
自视过高，妄自尊大
He has been too big for his breeches ever since he got the promotion.
自从晋升以来，他一直自视过高。
Use breeches naturally, then get feedback on meaning, tone, grammar, and phrasing.
Revisit a common error or keep this word in your review list.
记作：breech 的 'ee' 像两颗子弹，从枪的后膛装入；breach 的 'ea' 像裂缝，是突破。同音不同义。
语域：formal 常见场景：枪械或火炮的技术说明、军事或历史资料、射击运动装备介绍 breech 在这里表示枪炮的后膛，通常用于枪械或火炮的技术描述或历史叙述，多出现在书面、正式场合；口语中较少单独使用。
这些词都与 breech 的读音 /briːtʃ/ 押韵（重读元音 /iː/ 和后续辅音 /tʃ/ 相同）：speech, beech, leech, screech, beach, breach。其中 speech、beech、leech、screech 拼写为 -eech，与 breech 拼写一致；beach 和 breach 拼写为 -each，读音相同。注意拼写相似但读音不同的词：brioche（奶油面包，读 /briˈɒʃ/）。
Dictionary facts from ECDICT, WIKTIONARY.