promise; agreement; appointment; engagement; convention; rule
flight dynamics; aerodynamics; aeromechanics
start of work; commencement; opening
to sound; to ring; to resound; to echo; to roar; to rumble
lesson; class; teaching; instruction; classwork; schoolwork
(school) subject; curriculum; course; item; heading; entry
specialist training; upper-level course
to obligate; to make compulsory; to require; to mandate
day and night; around the clock; always; constantly
diligent study; devoting oneself to one's studies
not limited to; not just ...
academic year; school year; year in school; grade in school
inside; within; while (e.g. one is young); during; among; amongst; in (secret, chaos, poverty, etc.)
to play a central role; to take a leading part
to take (someone) with one; to bring along; to go with; to be accompanied by
ratio; proportion; percentage
technical; specialist; professional; exclusive
practice; exercise; military exercise; manoeuvres; seminar
to insert; to include; to incorporate; to install; to embed
diligent application (to work or study); cultivating one's character by studying hard; mutual encouragement (to improve); working hard together; friendly rivalry
school; school building; schoolhouse
school building; schoolhouse
first floor; ground floor; one floor; one storey; one rank
dining room; dining hall; cafeteria; restaurant; eatery; snack bar
sleeve; wing (of a stage, desk, gate, etc.); flap (of a dust jacket)
to pull; to draw; to string (lines); to run (cable); to pull towards oneself (e.g. someone's sleeve); to drag; to haul
to bend; to curve; to bend (the truth); to falsify; to corrupt; to sully
direction; way; person; lady; method of; manner of; care of ...
painful; difficult; distressing; (psychologically) difficult; straitened (circumstances); tight (financial situation)
to follow; to come along (with); to accompany; to come with (something); to follow as a result (of); to be incidental (to)
feeling guilty; having a guilty conscience; having qualms about
before long; soon; almost; nearly; finally; in the end
to arrive at; to reach; to sit on; to sit at (e.g. the table)
tap-tap; knock-knock; cough-cough; bark (of a fox); yelp; heavily (e.g. of snow falling)
knock; knocking; fungo hitting; hitting balls for fielding practice; tap; click (e.g. of a retractable pen or mechanical pencil)
entering a room; studying under a Buddhist teacher
management; administration; operation
to concern; to be related
piling up; multiple layers