Summation sign

[计] 累加符号

🧩 词语组成解析

summation [sʌ'meʃən]
n. 总和;加在一起;总结;概括;
summ(sum)+ation(名词后缀)→加法；合计；总括
sign [saɪn]
n. 符号;手势;迹象;指示牌; vt.& vi. 签名;打手势;
sign(mark)→记号；征兆；签字；做手势；表示

🗣️ 情景例句

You really don't look your age.
你看起来比你的年龄要年轻。
Oh, I'll probably just stay home.
哦，我可能就呆在家里了。
It's about a time when there were black slaves in North America. It's about their fight for freedom.
（它）讲的是有一段时期，北美洲存在黑奴。影片讲述他们为自由而斗争的情况。
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🔤 更多 S 开头的单词

sagging market
selective annealing
semi micelle
siderites
smooth tongue
spanning space
starting solution
stripping machine
全部 S 开头单词 ›