Sed
abbr. 航天工程文献（Space Engineering Document）；光谱能量分布（Spectral Energy Distribution）
🗣️ 情景例句
I've been thinking about it for weeks now.
为这事我想了几个星期。
It's difficult to make a decision whithout knowing all the facts.
不了解所有事实而做出决定是困难的。
They plan to immigrate to Finland next year.
他们计划明年移居芬兰。