- 重点词汇
- 相关例句
Warning sirens apparently went off three hours before the twister hit the building.
而显然的是,警报汽笛在龙卷风来袭三个小时之前就已拉响.
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False twister is an important part in rotor spinning. It has complex form and mass production.
假捻盘是转杯纺纱机上的关键零件, 它的形状复杂,生产批量大.
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Repeated twisting, awkward postures, and heavy lifting can all contribute to back pain and injury.
重复扭动, 不正确姿势及提举重物均可引致背痛及损伤.
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