底气

dǐ qì zú

底气足

have good lungs

tā dǐ qì bù zú pá dào sān céng jiù qì chuǎn le

他底气不足，爬到三层就气喘了。

He doesn't have very strong lungs and begins to pant after climbing to the third floor.

kàn dào xīn yī dài de chéng zhǎng wǒ men gōng zuò de dǐ qì gèng zú le

看到新一代的成长，我们工作的底气更足了。

Seeing the growth of the new generation, we work even more energetically.