🧩 词语组成解析
change
[tʃeindʒ]
vt. 改变，变更;交换，替换;兑换;换衣服（床单）;
vi. 改变，转变;交换，互换;换衣，更衣;
n. 变化，改变;交换，交替;零钱，找头;代替物;
of
[əv]
prep. 关于;属于…的;由…制成;
aux. 助动词 [非标准用语、方言] =have [主用于虚拟语气];
🗣️ 情景例句
What are you up to?
你在忙些什么？
Provided you can offer favorable quotations and guarantee delivery within four weeks from receipt of order, we will place regular orders with you.
贵方若能报优惠价并保证在收到定单后4周内交货，我方将定期订购。
Mathilde! I didn't know. I'm sorry. But what happened?
玛蒂尔德！我还不知道这些情况哩。我真难过。但是，这是怎么回事呢？