1·It was reprehensible of him to be so disloyal.
他如此不忠，应受谴责。
2·He hasn't been disloyal.
他并没有被不忠。
3·The king disgraced the disloyal courtier.
王国贬黜了那位不忠的朝臣。
1·She was so disloyal to her deputy she made his position untenable.
她对她的副手如此不忠诚，以至于弄得他的职位岌岌可危。
—— 《柯林斯英汉双解大词典》
2·And then when you change your mind without telling me, that means you're disloyal so we can't be down anymore.
但是如果你改变了你的想法，但是不告诉，这就意味着你不忠诚。
3·If you did not think of a friend who is dead, you would consider yourself disloyal, without love, and so on.
如果你不去想一个已经去世的朋友的话，你会认为自己不忠诚，没有爱，等等。