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小测验：选择正确的单词
- 论坛新贴
clack [klæk]
基本释义
- vt.
vi.
n. 噼啪响
词形变化
- 时 态：clacked, clack·ing, clacks名 词：clack'er
常用短语
- clack valve
止回阀
- clack valve
参考例句
- He clacked the nut open .
他把坚果敲开。
- He clacked the nut open .
英英解释
2个名词解释
- a sharp abrupt noise as if two objects hit together; may be repeated
[同] clack, clap - a simple valve with a hinge on one side; allows fluid to flow in only one direction
[同] clack, clack valve, clapper valve
3个动词解释
- a sharp abrupt noise as if two objects hit together; may be repeated