疑难用英语怎么说？

疑难

例句

• Here you'll find resources to assist you with all your realty needs. 你可以在这里找到所需资料去排解你的地产疑难.
• It took years to understand many perplexing diseases. 许多疑难病症要耗时数年才能搞明白。
• We are not expressiond with a less dramatic but too less foreseeing problem. 咱们也将面对唯一么有什么戏剧性和更不可预测的疑难题目.
• And non - operate treated galactophore disease, hysteromyoma, ovarian cyst, ect . gynecology difficulty mixed diseases. 对乳腺疾病 、 子宫肌瘤 、 卵巢囊肿等妇科疑难杂症 非 手术治疗效果显著.
• It took years to understand many perplexing diseases... 许多疑难病症要耗时数年才能搞明白。
• ...patients with a welter of confusing symptoms. 有一堆疑难症状的病人
• If you get stuck, click on Help. 如果碰到疑难，就点击“帮助”。