without

I cannot finish this difficult math homework without using a scientific calculator.

(Chinese) 没有科学计算器，我无法完成这项很难的数学作业。

Plants cannot grow healthy and strong without enough sunlight and water.

(Chinese) 没有足够的阳光和水，植物无法长得健康强壮。

He left the noisy party without saying goodbye to any of his friends.

(Chinese) 他没有跟任何朋友打声招呼就离开了那个嘈杂的派对。

She walked past me in the hallway without looking at or recognizing me.

(Chinese) 她在走廊里从我身边走过，没看我也没认出我来。