as yet, til now, heretofore, yet, thus far, so far, until now, up to now, hitherto, not_yet, not yet

to burn, to burn down

用于复句前一分句的动词前面, 提出某种明显的事例作为衬托, 常与“何况”“更”连用, 表示递进关系

to show (a movie), to screen

later on

江、河等接近发源地的部分