Definition of P's and Q's in English:

P's and Q's

(also Ps and Qs)

noun ˌpiːz (ə)n(d) ˈkjuːz

1"to be on one's P's and Q's" and variants: to be on one's best behaviour; to be at one's best, on top form; (US) to be alert, to be ‘on one's toes’.
2"to mind (also watch) one's P's and Q's": to be careful or particular in one's words or behaviour; to mind one's manners.
3"one's P's and Q's": one's alphabet, one's ‘A.B.C.’; (in extended use) knowledge or judgement, ‘one's way about’.

Origin

Early 17th century; earliest use found in Thomas Dekker (c1572–1632), playwright and pamphleteer. Origin unknown.

Definition of P's and Q's in US English:

P's and Q's

(also Ps and Qs)

nounˌpiːz (ə)n(d) ˈkjuːz

1"to be on one's P's and Q's" and variants: to be on one's best behaviour; to be at one's best, on top form; (US) to be alert, to be ‘on one's toes’.
2"to mind (also watch) one's P's and Q's": to be careful or particular in one's words or behaviour; to mind one's manners.
3"one's P's and Q's": one's alphabet, one's ‘A.B.C.’; (in extended use) knowledge or judgement, ‘one's way about’.

Origin

Early 17th century; earliest use found in Thomas Dekker (c1572–1632), playwright and pamphleteer. Origin unknown.

词汇	P's and Q's
释义	Definition of P's and Q's in English: P's and Q's (also Ps and Qs) noun ˌpiːz (ə)n(d) ˈkjuːz 1"to be on one's P's and Q's" and variants: to be on one's best behaviour; to be at one's best, on top form; (US) to be alert, to be ‘on one's toes’. 2"to mind (also watch) one's P's and Q's": to be careful or particular in one's words or behaviour; to mind one's manners. 3"one's P's and Q's": one's alphabet, one's ‘A.B.C.’; (in extended use) knowledge or judgement, ‘one's way about’. Origin Early 17th century; earliest use found in Thomas Dekker (c1572–1632), playwright and pamphleteer. Origin unknown. Definition of P's and Q's in US English: P's and Q's (also Ps and Qs) nounˌpiːz (ə)n(d) ˈkjuːz 1"to be on one's P's and Q's" and variants: to be on one's best behaviour; to be at one's best, on top form; (US) to be alert, to be ‘on one's toes’. 2"to mind (also watch) one's P's and Q's": to be careful or particular in one's words or behaviour; to mind one's manners. 3"one's P's and Q's": one's alphabet, one's ‘A.B.C.’; (in extended use) knowledge or judgement, ‘one's way about’. Origin Early 17th century; earliest use found in Thomas Dekker (c1572–1632), playwright and pamphleteer. Origin unknown.
随便看	give pause to someone (or give someone pause for thought) give payment to give permission give permission for give permission to give place to give place to give place to give pleasure to give pointers give poison to give power to give prominence to give promotion give promotion to give proof of give publicity to give pursuit give pursuit give quarter giver giver give reasons for give recognition to give rein to