he gave a demonstration of the new technique then and there
Related Translations:
当场: on the spot; then and there 短语和例子把这件事当场决定下来 decide the matter on the spot; 当场抓住 catch red-handed; catch in the act ; 当场拒绝他的要求 turn down his request on the spot; 他当场表演了这种新的操作方法。 he gave a d