Sources of supply
[经] 供应来源, 供货来源
🧩 词语组成解析
n. 输入源；发起者；来源（source的复数）
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];
supply
[sə'plaɪ]
vt. 供给;补充;弥补（缺陷、损失等）;向…提供（物资等）;
n. 供给物;储备物质;粮食;
vi. 暂代他人职务;
sup在下面+ply重叠，折叠→重叠下去→供应[下去],补给
🗣️ 情景例句
Too long. Have a seat and I'll get you a cup of tea.
太久了。请坐，我来给你弄杯茶。
I don't know where I've seen him before.
我不晓得在哪儿见过他。
Hello. Can I speak to Eric, please?
喂。请艾瑞克接电话好吗？