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With arms straight,rock forward,pressing down on the lower h

来源:学生作业帮 编辑:搜搜做题作业网作业帮 分类:英语作业 时间:2024/06/13 18:43:22
With arms straight,rock forward,pressing down on the lower half of the ribs
这里rock是什么意思,如果当动词摇动讲,为什么要用动词原形形式.
With arms straight,rock forward,pressing down on the lower h
是动词,"摆动"的意思.
是祈使句,所以动词原形.
With arms straight,和 pressing down on the lower half of the ribs是状语.