预订yù dìng
to place an order, to book ahead预防yù fáng
to prevent, to take precautions against领域lǐng yù
domain, sphere, field, territory领导lǐng dǎo
lead, leading, to lead, leadership频道pín dào
frequency, (television) channel颗kē
"classifier for small spheres, pearls, corn grains, teeth, hearts, satellites etc"题目tí mù
subject, title, topic