challenge switch

基本解释

This differential sialylation may provide a switch from innate anti-inflammatory activity in the steady state to generating adaptive pro-inflammatory effects upon antigenic challenge.
该差分唾液酸化可提供一种开关从与生俱来的，在稳定状态中的抗炎活性，以产生自适应的抗原刺激后的促炎性作用。
Saturday's draw with Arsenal finally saw off the lingering challenge of Liverpool, ending a tense title race and allowing the Reds' attentions to switch to facing La Liga's finest in Rome on 27 May.
周六和阿森纳的平局最终令利物浦的追赶成了白费，曼联终结了联赛的悬念可以专心准备27号在罗马举行的冠军杯决赛了。
forum.sports.sina.com.cn
While a robot partner would never be my equal in a relationship -- it can't be, as long as I control the on-off switch -- it could still challenge me intellectually.
在两人关系中，只要我控制着开关，机器人就永远不能挑战我的地位，智商除外。

What they needed to do was switch things around in her head so that the challenge became not taking the wallet but leaving it.
NEWYORKER: Found Objects
For Google, the challenge is keeping its income from search high, even as the users switch to accessing the Internet on the go.
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