Cross your arms in front.

两手臂交叉于前方。

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At a busy road in front of a gate of Bishan Middle School, the crosswalk is installed to keep the students safe when they cross the road after school.

在璧山中学门口一条繁忙的马路上，为了保证学生放学后过马路时的安全，设置了人行横道。

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Illustration: Planet and moon cross in front of star.

插图：地球和月球在恒星前方交叉。

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The Kepler space telescope looks for planets by measuring tiny decreases in the brightness of stars when planets cross in front of them.

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Telescopes such as Kepler search for planets as they transit, or cross in front of, their star, causing telltale dips in the star's brightness.

MSN: News editor