1 idol

1 incidentally

2 occasional

3 occasionally

4 by chance

5 randomly

1 occasionally

2 once in a while

3 sometimes

1 a chance encounter

2 to meet accidentally

1 accidental

2 image

3 pair

4 mate

1 to do sth once in a while (idiom)

2 to do sth more as an exception than the rule

1 chance remarks can lead to public execution (idiom)

1 single-handedly (idiom)

1 lit. single spear and horse (idiom); fig. single-handed

2 unaccompanied

1 The rise and fall of the nation concerns everyone (idiom). Everyone bears responsibility for the prosperity of society.