How to improve the ability of speaking English? Should I learn form the training institution? But it seems very expensive. Thanks for your advice.

”speed” and “velocity” As I want to say “speed” and “velocity”. What is the difference using ways between each other? Many thanks.

”speed” and “velocity” As I want to say “speed” and “velocity”. What is the difference using ways between each other? Many thanks.

What is different use of “machinery “and “machine “ When I use this two words,I confused. Such as the paragraph “textile machinery “and “textile machine”. Which one is correct? I appreciate you if you can help me. Thanks

What's the different use of ensure,guarantee? I appreciate you if you can help me to solve this question. Cause I do not know how to use this two words correctly. Thanks

What is different of “in”,”on” and “at”? When I use this three prepositions,I confused. I appreciate you so much,if you can figure out the question for me. Thanks

What is the different use between "implement" and "make"? Thanks When I need a word as a verb,I'm alway confused by "implement" and "make". I appreciate you so much if you can solve this problem for me.

How do you evaluate the movie of ‘the blind side’？

What is different use of "present" and "gift"? When I use this two words,I confused.I appreciate you if you can help me.Thanks