坚苦卓绝 meaning in English

staunch through trials and tribulations; endure hardship heroically; showing the utmost fortitude 短语和例子

Very large numbers of superior students are still not working up to their capacity , not been challenged to their best performance , not pursuing the hard intellectual programs which will develop their talents
很多优秀的学生仍然没有充分发挥他们的能力，没有挑战他们的极限，没有追求那些可以发展他们天赋的坚苦卓绝的脑力活动。
In addition , the astronaut candidates had to exercise in areas outside beijing such as the guanting reservoir , in order to train for sea escapes and wilderness survival . mr yang amply demonstrated his indefatigable spirit and unyielding perseverance during the five years of strenuous training . with tremendous courage , willpower and diligence he came first in three important assessments , and was eventually placed on the final shortlist of three
杨利伟先生在五年漫长的训练中，展现出无比刚强的意志、坚苦卓绝的精神，以百折不挠的勇气，日以继夜的努力，在强化训练的三次考试中，皆名列榜首，终于通过了种种考验，成为三位候选航天员之一。