curr = curr-next;
for (int digit = 0; digit < maxDigits; digit++) {
，更多细节参见搜狗输入法2026
特点：负区间平滑非零，避免 ReLU 死区问题。
Tens of millions watched on television as Lovell and two other astronauts splashed back down into the Pacific Ocean, a moment which has become one of the most iconic in the history of space travel.