Stemma
n. 家系, 家谱, (昆虫的)单眼
🗣️ 情景例句
No smile, no surprise.
不笑 ，就没有惊喜。
Are you in touch with him now?
你现在和他有联系吗？
This echo-location in bats is often compared with radar, the principle of which is similar.
蝙蝠这种回声定位常常可与雷达相比较，其原理是相似的。