A: the official start of the voter registration for South Sudan referendum is a positive step towards a smooth referendum process.

答：苏丹南方公投登记工作的正式启动是朝着顺利举行南方公投迈出的积极步骤。

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In reality, Gates is a smooth operator who, despite his uncombed hair, baby face and disheveled appearance, knew exactly what he was doing every step of the way.

在现实中，尽管盖茨的头发总是乱糟糟的，又长着张娃娃脸，不修边幅，他可是个老练的生意人，每走一步都成竹在胸。

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I leave my boots dripping at the door and step inside, anticipating the smooth pine floor and pleasant buttery scent of oil-lamps.

我在门前脱下湿淋淋的鞋子步入大堂，预期中光滑的松木地板和散发着黄油香味的油灯。

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