A) A phrase that seems to simply state the obvious but actually implies helplessness. B) A phrase that seems to simply state the obvious but actually means it will be what it is, as in it ain't gonna change, so deal with it or don't.. See also tough shit, oh well, cry me a river and tfb.
Find and run to your nearest escape route, whether it's behind a fence, a tree (one she cannot knock down), a large bale, a tractor or truck, anything that is large enough that will protect you and act as a barrier between you and that cow.
remove the placenta so that the cow can not eat it,  allow the cow to lick the calf dry,  dip the navel in some Iodine (20%) disinfectant (neat vodka or other strong alcoholic drink will do if there is nothing else),  assist the calf to suckle the cow if it is having difficulty.