dart学习（二）

关键字

abstract	dynamic	implements	show
as	else	import	static
assert	enum	in	super
async	export	interface	switch
await	extends	is	sync
break	external	library	this
case	factory	mixin	throw
catch	false	new	true
class	final	null	try
const	finally	on	typedef
continue	for	operator	var
covariant	Function	part	void
default	get	rethrow	while
deferred	hide	return	with
do	if	set	yield