 In our experiments, the technique boosts the performance for some commonly used UMT methods by 1.5-2.0 BLEU.
<clarity>  In our experiments, the technique boosts the performance for some commonly used UMT methods by 1.5-2.0 BLEU.
 In our experiments, the technique boosts the performance of the standard UMT methods by 1.5-2.0 BLEU.