We had to tip up the bed and the model was in grave danger of falling off it!. [VERB PREP. noun]

我们不得不把床的一头掀起来，模型差点就从床上掉了下去！

Tip the bottle up so it's in the same position as it would be when feeding the baby. [VERB noun PREP.]

按照喂婴儿时的姿势倾斜奶瓶。

The aircraft leveled out, and tipped up again for its climb to 20,000 feet. [VERB PREP.]

飞机上升后平直飞行，随后又再一次爬升，高度升至 2 万英尺。