Spectrogram : বর্ণালির আলোকক চিত্র বা রেখা চিত্র;
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Appropriate Prepositions
Covetous of(লোভী হওয়া): He is covetous of wealth.
Devote to (উৎসর্গ করা/নিয়োজিত করা): Students should devote sufficient time to their studies.
Full of (পরিপূর্ণ): Our Rivers are full of fishes.
Inquire into (খতিয়ে দেখা): The police officer will inquire into the matter.
Look for (খোঁজা): I was looking for the lost phone.
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Idioms
At the eleventh hour (at the last moment-শেষ মুহুর্তে adv.) The patient was in a dangerous condition and the doctor came at the eleventh hour.
Be all and end all (the ultimate out come- চরম পরিণতি—n) A loss of one million taka was the be all and end all of the projects.
Gain Ground (সুবিধা পাওয়া): The wise are said to gain the ground in the long run.
On the contrary (বিপরীত পক্ষে): I do not hate him; on the contrary I love him.
Ups and downs (উত্থান পতন)- There is ups and downs in a man's life.