Vectorgram
[医] 心电向量图, 向量图
🗣️ 情景例句
He never married because
他不结婚是因为
Work has a bitter root but sweet fruit.
劳动根虽苦，然而果实甜。
The best time to come to China is in spring or autumn.
到中国来，最好的时间是在春天或者秋天。