It must have galled him that Nick thwarted each of these measures.
尼克对每一个措施都加以阻挠，这一定激怒了他。
The plural 's' is not a free form, as it must always be attached to a noun.
表示复数的s不是自由语素，必须附着于名词。
It must be conceded that different judges have different approaches to these cases.
必须承认不同的法官会采用不同的方法来判定这些案件。
It must be noted, however, that not all British and American officers carried out orders.
然而，一定要注意，并非所有英美军官都执行命令。
It must be at a rolling boil for at least three minutes.
它必须在沸腾状态下至少煮三分钟。
"If she says that, it must be a nice song," Colin answered.
“如果她这么说，那一定是一首好歌。”科林回答。
It must be acknowledged that she had faults to foil her gifts.
必须承认她有缺点来衬托她的优点。
If it walks like a duck and quacks like a duck, it must be a duck.
如果它像鸭子一样走路，像鸭子一样呱呱叫，那它一定是一只鸭子。
It must be really old, about 4 billion years, give or take a few hundred million years.
它一定非常古老，大约有40亿年，有几亿年的误差。
It must be the summer air that affects me with feelings almost as disquieting as they are refreshing.
一定是春天的气息使我不安，就像它使人神清气爽一样。
It is vital that once an institution claims to be particularly good at something, it must live up to it.
至关重要的是，一旦一家机构声称自己在某方面特别擅长，它就必须做到这一点。
Toni reckoned that it must be about three o'clock.
托尼想一定是3点钟左右了。
I felt sorry for him and his colleagues – it must have been so frustrating for them.
我很同情他和他的同事们–这对他们来说肯定是非常令人沮丧。
It is strange to think that he held strong views on many things, but it must have been so.
想到当时他对许多事情的观点都很强硬，真是很奇怪，但那时应该就是这样。
'Eat' has the selectional restriction that it must be followed by a kind of food, so 'I eat sky' is not possible.
eat一词之后限跟某种食物，所以不可能说Ieatsky。
这一定是卡罗尔的。
这一定是我妈妈。
那一定很危险。
你穿起来一定很好看。
It must be a most unusual exhibition.
这一定是一次非常不寻常的展览。
Then it must be a popular place.
那么它一定是个受欢迎的地方。
It must be near the time for dinner.
一定快到吃晚饭的时候了。
—Gina, whose book is this? —It must be Carla's.
——吉娜，这是谁的书？ ——一定是卡拉的。
It must have got into the dough by mistake.
它一定是不小心掉进面团里了。
It tasted awful, so it must be good for us!
它尝起来很难吃，所以肯定对我们有益！
It must be Jeff's dictionary. Look! His name is on Page One.
这一定是杰夫的字典。看！第一页有他的名字。
I'm forty years old now, so it must be at least fifty.
我现在四十岁了，所以它至少也有五十岁。
The family photos aren't in my room, it must be in his.
家庭合照不在我的房间里，肯定在他的房间里。
If reading is to learn anything more than passing time, it must be active.
如果读书是为了学到点什么，而非仅仅为消磨时间，那它必须是主动的。
The first step to grow rice is preparing the land. It must be level.
种植水稻的第一步是准备好土地。它必须是平坦的。
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