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麻烦帮忙改正一下。想要规定thetaBoundary为一个常数值，然后对theta（相分数）进行对比，总是实现不了。谢谢。
const Field<scalar>& theta(); const Field<scalar>& thetaBoundary(); thetaBoundary = {0.5}; if (theta < thetaBoundary)
