在广告期间，屏幕底部会出现一条信息，提示观众按下按钮以请求获得免费样品或订购优惠券或目录。
During commercials, an overlay will appear at the bottom of the screen, prompting viewers to press a button to request a free sample or order a coupon or a catalogue.
一份细胞样品底部的微型爆炸可能有助于鉴定疾病。
Mini-explosions under a cell sample could help to identify disease.
降低闩，以便被重量的样品结束进入那放置过滤器的底部解决在上面用纸糊1.0寸(25毫米)那表面。
Lower crossbar so that the weighted sample end enters the solution positioning the bottom of the filter paper 1.0 inch (25 mm) above the surface.
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