通常我们把这种导视片叫做收视指南，它也是包装形式之一。
We usually this film called Your Guide ratings, it is one form of packaging.
移动导杆机构是平面四杆机构的一种变形形式。
Moving leader mechanism is a special style of the planar four-bar mechanism.
移动导杆机构是平面四杆机构的一种变形形式。
Moving leader mechanism is a special style of the planar four-bar mechanism.
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