Catalyst bulk density
[建] 催化剂之堆密度
🧩 词语组成解析
bulk
[bʌlk]
n. （大）体积;大块，大量;大多数，大部分;主体;
vt.& vi. 变得越来越大（或重要）;
vi. 显得庞大;形成大块;堆积起来;
vt. 使凝聚成一团或形成一堆;
adj. 大批的，大量的;散装的;
🗣️ 情景例句
Practice tenses as much as possible.
操练各种时态。
Would you be so kind as to lend me some money?
你能借我一点儿钱吗？
I tried to say something, but my mouth was full of cotton wool.
我想说点什么，但我嘴里塞满了药棉。