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- It is often difficult to forbear from expressing one's opinion. 克制自己不发表意见常常是很难的。
- The truth is often difficult to come at. 事情真相往往难以发现。
- Since Mr.Cramer is a traveling salesman, he's often difficult to run to ground. 因为克拉默先生是在各地巡游的推销员，所以常常难以弄清他正在什么地方。
- The determination of the meaning of a word is often difficult without a context. 脱离上下文来确定一个词的含义常常是困难的。
- It is often difficult to come at the true facts. 弄清楚事实真相往往是困难的。
- It's often difficult to structure one's career. 安排自己的职业通常很困难。
- It's often difficult to translate poems. 翻译诗歌在许多情况下都是困难的。
- It is often difficult to discern between the two. 这一般很难一眼将两者区分开来。
- It's often difficult to withhold from expressing one's opinion. 要克制自己不发表意见通常是很困难的。
- It is often difficult to dissociate cause from effect. 往往很难把因果截然分开。
- It is often difficult to call the outcome of an election. 预测选举的结果常常是困难的
- It is often difficult to get arimals to mate in captivity. 常常很难使被关的动物交配。
- It is often difficult to find a proper equilibrium between stability and variability. 在稳定性和变化性之间通常很难找到适当的平衡。
- It is often difficult to get animals to mate in captivity . 常常很难使被关的动物交配。
- It is often difficult to discern how widespread public support is. 了解公众支持的广泛程度常常是困难的。
- The computations are often difficult for a particular object. 对于特定物体的计算往往很困难。
- It is often difficult to put technical matters into lay language. 用外行人的语言来说明技术问题，这常常是困难的。
- When someone has no will to live, he is often difficult to help. 当一个人不想活时,就几乎无可救药。
- It is often difficult to get animals to mate in captivity. 常常很难使被关的动物交配。
- The diagnosis of pulmonary endometriosis is often difficult. 诊断子宫内膜异位症通常很困难。
