Lead tetracthyl
[机] 四乙基铅
🧩 词语组成解析
lead
[lid]
vt. 领导;引导;指挥;
vi. 领导;导致;用水砣测深;
n. 铅;领导;榜样;枪弹;
adj. 领头的;最重要的;领先的;
🗣️ 情景例句
because the doctors and nurses are so busy?
因为医生和护士们都非常忙？
Step after step the ladder is ascended.
按部就班，循序渐进。
she has to help with the washing.
她得帮忙洗衣服。