have perseverance; keep to sth faithfully; make unremitting efforts; persevere in (doing sth)
❍ 他为自己安排了一个学习计划，～。He drew up a plan of study and kept to it faithfully.
持之以恒
make consistent efforts; persevere;persist
必须～。Perseverance is essential.
持之以恒chí zhī yǐ hénɡ
有恒心地坚持下去。perserve, perseveringly, keep to sth. faithfully