Strength grading of cement
[化] 水泥标号
🧩 词语组成解析
[经] 分级, 归类
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];
cement
[si'ment]
n. 水泥;胶合剂;胶接剂;粘固粉;
vt. 粘牢;巩固;（用水泥、胶等）粘结;在…上抹水泥;
🗣️ 情景例句
She called to say the plane was delayed.
她打电话回来， 告诉我们飞机误点。
After meat, mustard.
雨后送伞。
There's no time! laughed Mother.Here are the twins.
“没时间了！”母亲笑着说，“双胞姐妹到了。”