应该首先翻译英文注释和变量名，将之写成中文；同时，需要修改代码的输出语言为中文，以便更好地满足中文用户的需求。

下面是一个简单的例子：

from random import randint


def random_placement(n):
    """
    在网格中随机放置舰船

    参数:
    n -- 网格大小

    返回值:
    一个包含舰船位置的嵌套列表
    """
    board = []
    for x in range(n):
        board.append(['O'] * n)

    length = 4
    ship_count = 1

    while ship_count <= 4:
        row = randint(0, n - 1)
        col = randint(0, n - 1)
        orientation = randint(0, 1)

        if orientation == 0 and col <= n - length:
            positions = [[row, c] for c in range(col, col + length)]
        elif orientation == 1 and row <= n - length:
            positions = [[r, col] for r in range(row, row + length)]
        else:
            continue

        is_overlap = False
        for pos in positions:
            if board[pos[0]][pos[1]] != 'O':
                is_overlap = True
                break

        if not is_overlap:
            for pos in positions:
                board[pos[0]][pos[1]] = 'S'
            ship_count += 1

    return board


if __name__ == '__main__':
    board = random_placement(10)
    for row in board:
        print(' '.join(row).replace('O', '水').replace('S', '舰'))

这个例子'舰船”与“水”的翻译代替了英文注释和变量名，同时将输出语言翻译成了中文。