如何在Google Translate API调用中添加HTTP Header Content-Length？

import requests

# 设置API请求的URL
url = "https://translation.googleapis.com/language/translate/v2"

# 设置请求头部信息，包括API密钥和Content-Length
headers = {
    "Content-Type": "application/json",
    "Authorization": "Bearer YOUR_API_KEY",
    "Content-Length": "YOUR_CONTENT_LENGTH"
}

# 设置请求参数，包括要翻译的文本和目标语言等
params = {
    "q": "Hello, world!",
    "target": "zh-CN"
}

# 发送POST请求
response = requests.post(url, headers=headers, params=params)

# 处理API响应
if response.status_code == 200:
    translation = response.json()["data"]["translations"][0]["translatedText"]
    print("翻译结果：", translation)
else:
    print("API请求失败：", response.text)