2019 4.22 support run on a single gpu multi-gpus hava bug now!
./run_preprocess.sh ${src_path} ${tgt_path} ${src_vocab} ${tgt_vocab} ${output}
./run_train.sh ${train_file} ${checkpoint_dir}
nohup ./run_eval_on_dev_select_best_model.sh ${dev_file} ${ref_file} &
./run_translate.sh ${test_file}