Improving regulation is a tortuous process, as new chemical rules show.
新的化学物品条例表明，完善管控过程曲折复杂。
The cognition of "Propriety" and "Ceremony and Propriety" has experienced a tortuous process in our country.
我国对“礼”和“礼仪”的认识经历了曲折的过程。
The cognition of "Propriety" and "Ceremony and Propriety" has experienced a tortuous process in our country.
我国对“礼”和“礼仪”的认识经历了曲折的过程。
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