e.g. for example < less than ≤ no more than > more than ≥ no less than ≈ approximately = equal to ≠ not equal to * important ** very important × wrong, bad √ right, good ↑ increase ↓ decrease + better - worse ∵ because ∴ so ← reason → result ? question ! key point ∈ belong to & and 缩写: cont. for continued ed education Prof. professer ch child curr curriculum chem chemistry hist history
c/room classroom geog geography Lng learning bk book prob probably ex exercise with w/ 18th century 18c |