TOLD/SOND: update SequenceBinaryCrossEntropy loss

志浩

2023-08-01 66880c2a1aeb3f94ce0020a71397e213beb9f3a0

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2
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9
X    1
XX    2
XXX    3
XL    4
L    5
LX    6
LXX    7
LXXX    8
XC    9