Closed sand filter
[建] 密闭砂滤器
🧩 词语组成解析
closed
[klozd]
adj. 关闭着的，封闭着的;密闭着的，保密的;<美>准备好了的，定了契约的;
v. “close”的过去式和过去分词;
clos=close关闭+ed已...的→关闭了的
sand
[sænd]
n. 沙;沙滩;沙色;
vt. 撒沙于;用砂纸磨光;
filter
['fɪltɚ]
n. 滤波器;滤光器;滤色镜;[化] 过滤器;
vi. 过滤;透过;渗透;
vt. 过滤;滤除;
🗣️ 情景例句
About forty minutes, I think.
我想大约40分钟。
Therefore, having a basic knowledge of business.
因此，懂得一些商务和贸易的英语术语。
One would expect them to know their parts by heart and never have cause to falter.
人们以为，这些演员一定会把台词背得烂熟，绝不会临场结巴的，