vt.使緊；勒緊；固定

vi.變緊

He tightened his grip on her arm. 他緊抓她的手臂。

The plumber take out a wrench and tighten the bolt. 修水管的工人拿出一把扳手?jǐn)Q緊了螺栓。

This month we have to tighten our belts. 這個(gè)月我不得不勒緊褲腰帶過日子。

If table index shafts are loose, tighten mounting bolts. 如果臺(tái)面索引軸松動(dòng)，擰緊固定螺栓。

This screw needs tightening. 這螺絲釘需要再擰緊些。

Controls in the city have gradually tightened. 對(duì)這個(gè)城市的控制逐漸加強(qiáng)。