如何将单词对从文件存储到字符串？

def read_word_pairs_from_file(file_path):
    word_pairs = ""
    with open(file_path, 'r') as file:
        content = file.read()
        # 假设文件中每行包含一个单词对，以空格分隔
        lines = content.split('\n')
        for line in lines:
            words = line.split(' ')
            if len(words) == 2:
                word_pairs += f"{words[0]}: {words[1]}\n"
    return word_pairs

file_path = "word_pairs.txt"
word_pairs_string = read_word_pairs_from_file(file_path)
print(word_pairs_string)