The home team was beginning to gain the upper hand.

主队正开始占上风。

《柯林斯英汉双解大词典》

When we sleep, for example, the saliva stream slows, and sulfur producing bacteria gain the upper hand, producing classic "morning breath".

例如，当我们睡觉时，唾液流变慢，产生硫的细菌占上风，便会产生典型的“晨起口臭”。

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Were the arrests an attempt to unsettle Rio and gain the upper hand in the negotiations?

逮捕力拓雇员是否是为了令力拓不安，以及在谈判中占得上风？

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If Europe is divided, those who have an ultra-free market concept of Europe would gain the upper hand.

BBC: Chirac's EU treaty plea: Excerpts

Both sides battled to gain the upper hand in the second-half, with a total of six players booked.

BBC: Gravesend 0-0 Farnborough

Henman never looked back, breaking in the sixth game of the second set to again gain the upper hand.

BBC: Henman eases through