“本能地”用英语怎么说

我发现当我们的目光相遇时，我本能地还以微笑。I found myself smiling back instinc-tively when our eyes met.飞行员本能地驾机避开他们。The pilot instinctively maneuvered to avoid them.她本能地攥紧了拳头.Her hands clenched involuntarily....