如何替换altair中的轴标签？

import altair as alt
from vega_datasets import data

# 加载数据
source = data.cars()

# 创建图表
chart = alt.Chart(source).mark_point().encode(
    x='Horsepower',
    y='Miles_per_Gallon',
    color='Origin'
)

# 替换x轴和y轴的标签
chart = chart.configure_axis(
    # 替换x轴标签
    x=alt.Axis(title='马力'),
    # 替换y轴标签
    y=alt.Axis(title='每加仑英里数')
)

# 显示图表
chart.show()