Welsbach
burner韦耳斯拔煤气喷嘴
🗣️ 情景例句
I've been thinking about it for weeks now.
为这事我想了几个星期。
What are you looking at?
你正在看什么？
Such undertakings require the precise planning and foresight of military operations.
这种活动需要有军事行动般的周密布署和预见能力。