创建通过字典翻译DNA序列的函数

def translate_dna_sequence(dna_sequence):
    dna_dict = {
        'A': 'Adenine',
        'T': 'Thymine',
        'C': 'Cytosine',
        'G': 'Guanine'
    }
    
    translated_sequence = ''
    for nucleotide in dna_sequence:
        if nucleotide in dna_dict:
            translated_sequence += dna_dict[nucleotide] + ' '
        else:
            translated_sequence += 'Unknown '
    
    return translated_sequence.strip()

# 示例用法
dna_sequence = 'ATCG'
translated_sequence = translate_dna_sequence(dna_sequence)
print(translated_sequence)