Sirtf
空间红外望远镜
🗣️ 情景例句
You ready for the next problem?
你准备好做下一道题了吗？
When the fox preacheth,then beware your geese.
每逢狐狸讲道，当心鹅儿遭殃。
That's a big box. Is it heavy? Please let me help you.
这是个大盒子。重吗？让我来帮你。