In the heart, one of the two lower chambers. Blood arrives in the upper chambers (the atria), drops down into the ventricles, and then the ventricles squeeze hard and push it out — the right ventricle sends blood to the lungs, the left ventricle sends it to the whole rest of the body. That is why the left ventricle has the thickest muscle wall of the four chambers: it has the longest job.

In the heart在心臟裡，one of the two lower chambers是兩個下腔室之一；blood arrives in the upper chambers (the atria)血液先進到上面的腔室（心房），drops down into the ventricles再流到心室裡，and然後 the ventricles squeeze hard and push it out心室用力收縮把血擠出去——the right ventricle sends blood to the lungs右心室把血送到肺，the left ventricle sends it to the whole rest of the body左心室把血送到全身其他地方；that is why這就是為什麼 the left ventricle has the thickest muscle wall of the four chambers左心室的肌肉壁是四個腔室裡最厚的：it has the longest job因為它的工作量最大。

The word also names four fluid-filled spaces inside the brain, which hold and circulate the clear liquid that cushions it; you meet this use in medicine and brain scans. So 'ventricle' really means 'a hollow chamber inside an organ', and which organ depends on the context.

The word also names也用來指 four fluid-filled spaces inside the brain大腦裡四個裝著液體的空間，which hold and circulate the clear liquid that cushions it這些空間容納並流通保護大腦的清澈液體；you meet this use in medicine and brain scans你會在醫學和腦部掃描裡遇到這個用法；so所以 'ventricle' really means「ventricle」真正的意思是 'a hollow chamber inside an organ'器官裡的中空腔室，and而 which organ depends on the context是哪個器官要看上下文。

It is a technical word — you meet it in biology class, in hospitals, and in health news about heart failure — not in ordinary chat. The adjective is ventricular: ventricular fibrillation, a dangerous heart rhythm that ambulance crews treat with a defibrillator.

It is a technical word這是一個專業術語——you meet it in biology class你會在生物課、in hospitals醫院、and而且 in health news about heart failure在講心臟衰竭的健康新聞裡遇到它——not而不是 in ordinary chat在日常聊天裡出現；the adjective形容詞 is是 ventricular ventricular：ventricular fibrillation心室顫動，a dangerous heart rhythm一種危險的心律，that ambulance crews treat with a defibrillator救護人員會用電擊器治療。