坚持不渝
坚持到底，不改变，例他们不畏困难，数十年如一日，终于在自然科学的领域里创造了奇迹，这种坚持不渝的精神真是令人感佩。 In spite of difficulties，they stuck to the job day in and day out and finally achieved remarkable success in the field of natural sciences．The unremitting spirit they showed has been truly admirable． |