Ruthenium : রূটীনিয়মপদার্থ; প্ল্যাটিনাম গোত্রের একটি বিরল মৌল;
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Appropriate Prepositions
Agree with, on, to(একমত হওয়া): My father agreed with me on this point, but he did not agree to my proposal to set up a canteen.
Congratulate on(অভিনন্দন জানানো): They congratulated me on my brilliant success.
Desist from (বিরত থাকা): She desisted from making this.
Hostile to (বিরোধী বা বিরূপ ভাবাপন্ন): Nobody is hostile to you.
Look after (দেখাশুনা): He looks after me.
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Idioms
At every step (প্রতি পদে পদে): There are dangers at every step in our life and yet we want to live.
Black sheep - (কুলাঙ্গার): Stay away from the Black sheep.
Hard nut to crack (কঠিন সমস্যা): The problem of adult education is really hard nut to crack.
Pass away (মারা যাওয়া)— He passed away last night.
Weal and woe (সুখ-দুঃখ): Human life is full of weal and woe.