Upper stem seal
[化] 上阀杆密封
🧩 词语组成解析
upper
['ʌpə]
adj. 地位较高的;上面的;内地的;地表层的;
n. 鞋帮，靴面;兴奋剂;令人兴奋的经历;
stem
[stɛm]
n. （花草的）茎;词干;（高脚酒杯的）脚;烟斗柄;
vt. 遏制[阻止]（液体的流动等）;阻止;封堵;遏止;
seal
[sil]
n. 密封;印章;海豹;封条;
v. 密封;盖章;决定;封上（信封）;
🗣️ 情景例句
No. I really don't know how to go about it.
没有。我真不知道如何填。
Acl!
啊！
After having been wounded towards the end of the war, he had been sent to hospital and was separated from his unit.
战争即将结束时，他负伤被送进医院，并与部队失去联系。