Friction resistance can be greatly reduced because no slide way is arranged.
而且其结构可以没有滑道大幅度的减少摩擦阻力。
Focus on one topic area and use no more than four bullets per slide.
集中一个话题，并且每张幻灯片不要多于四个关键点。
No more than four images per slide.
一张幻灯片里不要多余4幅图片；
No. he said he'd jammed the slide and had to put it in for repair.
他说他把滑座卡住了，只好拿去修理。
Is the star in the slide? No, it's under the slide.
那颗星星在滑梯上吗？——不，它在滑梯下。
No Running Or Walking Up Slide.
禁止向滑梯上方奔跑或行走。
No Running Or Walking Up Slide.
禁止向滑梯上方奔跑或行走。
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