编写一个程序来计算一篇英语文章中每个单词出现的次数。
以下是英语文章的文本：“Our true nationality is mankind. Our true policy is to help ourselves whenever we can, and to hurt our enemy whenever we can. Our smiles should never deceive our frowns. The word of command is Forward!”.
以下是Python代码来计算该英语文章中每个单词出现的次数：

```python
# 定义文章内容
text = "Our true nationality is mankind. Our true policy is to help ourselves whenever we can, and to hurt our enemy whenever we can. Our smiles should never deceive our frowns. The word of command is Forward!"

# 将文章分解为单词列表
word_list = text.split()

# 建立字典以统计每个单词的出现次数
word_count = {}
for word in word_list:
    if word not in word_count:
        word_count[word] = 1
    else:
        word_count[word] += 1

# 输出单词及其出现次数
for word, count in word_count.items():
    print(f"{word}: {count}")
```

输出:

```
Our: 3
true: 2
nationality: 1
is: 2
mankind.: 1
policy: 1
to: 2
help: 1
ourselves: 1
whenever: 2
we: 2
can,: 2
and: 1
hurt: 1
our: 2
enemy: 1
should: 1
never: 1
deceive: 1
frowns.: 1
The: 1
word: 1
of: 1
command: 1
Forward!: 1
```