Helioseismology
日震学
🗣️ 情景例句
mashed potatoes, and a tossed green salad to begin with.
马铃薯泥， 还有蔬菜沙拉当头道菜。
Will you please lock the door when you leave?
请您当你离开时，锁门？
Though he owned a large car,
尽管他有一辆豪华小轿车，