順其自然：Idiom：Let nature take its course.
To let events develop and conclude naturally, i.e., as they would without outside intervention, help, or interference. The phrase can refer to nature literally, or figuratively to manmade situations or events.
run around in circles：be fussily busy with little result
hold back：
1. To physically restrain someone or something. In this usage, a noun or pronoun can be used between "hold" and "back."I held him back so that he didn't run after her.
2. To not do something to the fullest extent that one can.Don't hold back on the court—I don't want you to let me win.
3. To obstruct someone or something. In this usage, a noun or pronoun can be used between "hold" and "back."Your fears are really holding you back in life.The levee is holding back the floodwaters, for now.
4. To keep something in one's possession. In this usage, a noun or pronoun can be used between "hold" and "back."I held back some of the money, so we still have some cash left.
5. To withhold someone or something (from something). In this usage, a noun or pronoun can be used between "hold" and "out."I heard that Sarah's parents are holding her back from play rehearsals because she has the mumps.Hold these pink cupcakes back for now—there's more than enough already on the table.
6. To require a student to repeat a grade of school. In this usage, a noun or pronoun can be used between "hold" and "back."Am I really being held back? I don't want to repeat junior year—can't I go to summer school or something?We may have to hold you back a year if you don't pass this test.
