If you have made an intimate relationship with a first-class, it's so critical to treat his child and dog like a friend except essential courtesy and etiquette. 如果你已經(jīng)與某位上流人士結成很密切的關(guān)系，那么除了必要的客套和禮儀外，以朋友的態(tài)度對待他的孩子和狗是很重要的。
When a new clean AC power supply is designed, it is very necessary to know the relationship between the equivalent induction and the thyristor turn-on angle. 在設計新型交流凈化電源時(shí)，掌握等效電感和雙向晶閘管延遲導通角之間的關(guān)系很重要。
