Operating cost : চালন ব্যয়;
Related Words
operating cost  operating director  See Words Also In
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Appropriate Prepositions
Care for(গ্রাহ্য করা): I do not care for you.
Control over(নিয়ন্ত্রণ): He has no control over his sons.
Covetous of(লোভী হওয়া): He is covetous of wealth.
Repent on (নির্ভরশীল): He is repent on his parents.
Take pity on (দয়া করা): Take pity on the helpless people.
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Idioms
At a snail's pace (very slowly – খুব ধীর গতিতে) The economy of Bangladesh is growing at a snail’s pace.
At death’s door (at the point of death- মৃত্যুর দ্বারে) The patient is now at death’s door.
Gala day (বিশেষ দিন): The Eid–Ul-Fitr is a gala day for Muslims.
On the contrary (বিপরীত পক্ষে): I do not hate him; on the contrary I love him.
Worthy of (যোগ্য) - He is worthy of a good job.