pledge

/plɛʤ/

promise solemnly and formally

中文释义：发誓；保证

The government pledged to reduce carbon emissions by 50% by 2030.

政府发誓到2030年将碳排放量减少50%。

She pledged her support to the charity and donated a large sum of money.

她保证支持该慈善机构并捐赠了一大笔钱。