what does "insider baseball" means?

What does this sentence mean? "I see myself as someone who is reserved."

Is there such word like "instantial" in English? I've come across the word "instantial" in some article, e.g. instantial use of phraseological units, but i can't find it in any English-Russian dictionary. There is a word "instantiate", but i don't know whether these words have the same meaning.

What does "ref" mean here? NDVI_ref=0.95 I guess ref is reference, but what is the meaning of the word here?

What does the word "boots" mean here? Please send us till the end of April (30) 2013 the full (1 pg. - A4) presentation the invention or research project, with graphics, photos etc., in English. Please be aware that this year a lot of inventors announce their presence and the presentation boots are limited.

Wie sagt man auf Deutsch "I am a first year student"?

Can you explain the first part of the sentence? He made good time and in under three hours had reached Lowestoft. I guess "to make good time" is some expression, but don't know the meaning.

Was kann man diese Saetze ins Russisch ubersetzen? 1) Dann hörte ich mit den Frauen von den anderen Schlitten reden 2) Und sofort sah, dass ich etwas vermasselt hatte Im ersten Satz weiss ich nicht, warum man hier "mit" braucht