He felt his head jerk reflexively.

他感到自己的头部突然反射性的抽动。

《柯林斯英汉双解大词典》

Still clutching the warm cup in his fist, he gulped reflexively, scalding his tongue.

他手中依然攥着那杯热茶，本能地一饮而尽，舌头都被灼伤了。

youdao

A more direct problem is that when people reflexively use data types, they often end up reducing flexibility in unanticipated ways.

更直接的问题是，当人们反射性地使用数据类型时，常常以无法预料的方式降低灵活性。

youdao

And, despite what you may have read in the blogosphere, it is not reflexively anti-natural gas.

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Today, however, Democrats and even some Republicans see deficits and reflexively want to raise prices, i.e. taxes.

FORBES: Keynes Would Not Raise Taxes Today

Becoming a person who naturally and reflexively gives away success is seldom the result of a sudden epiphany.

FORBES: Giving Away Credit; Is It Worth It?