The high cost seems to be a fly in the ointment.
美中不足的是成本过高。
a fly in the ointment 字面意思是：“软骨里的苍蝇”，这个习语出自《圣经·传道书》，“死苍蝇会让香甜的软骨变质，同样，一件小小的蠢事也会令智慧失色。”现在，人们用这个习语来表示：“美中不足之处，煞风景的事情，令人扫兴的小事”。因此，当美国人说"The high cost seems to be a fly in the ointment."时，他/她要表达的意思就是:"I'm only unsatisfied with the high cost."、"It's perfect except the cost."。
情景对白：
Boss: I have seen your plan. It is great. Nevertheless, the high cost seems to be a fly in the ointment.
老板：我看过你的方案了，非常好。但美中不足的是成本过高。
Terry: I will see if I can cut down any unneccessary expense.
泰瑞：我看看还能不能削减任何不必要的费用。
搭配句积累：
①Do you have any other good idea?
还有什么其他的好点子吗？
②You'd better think out ways to cut the cost.
你最好想办法减少成本。
③But what matters is the final profit not the cost now.
但是重点是最终利润而不是眼前的成本。
④Whatever we plant now, we will harvest later.
我们现在的付出将来会得到回报的。
单词：
ointment n. 油膏，药膏
A range of ointments and creams is available for the treatment of eczema.
有一系列治疗湿疹的油膏和乳膏可以买到。
He received ointment for his flaking skin.
医生给他开了治疗脱皮的软膏。
