southerly (wind); from the south
aeroplane; airplane; aircraft
to connect (with a different flight, train, etc.); to make a connection; to change (planes, trains, etc.)
medium; average; moderation; middle school; China; volume two (of three); during (a certain time when one did or is doing something)
drainage basin; catchment basin; river basin; watershed; valley
until (a time); till; to (a place or person); as far as; to (an extent); up to
wholly; solely; entirely; principally; mostly; chiefly
ship; boat; tank; tub; counter for boat-shaped containers (e.g. of sashimi)
river; stream; River; the ... river
going upstream; swimming upstream
emergency; extraordinary; unusual
high and low; rise and fall
difference; variation; difference
few; a little; scarce; insufficient; seldom
to go upstream; to go back (in time, to origin); to date back to; to trace back to
although I say; although one might say; although called
to cross (e.g. road); to traverse
feeling; sense; impression
purpose; goal; aim; objective; intention
decrease; reduction; decline
tropical forest; tropical rainforest
investigation; examination; inquiry; enquiry; survey
by means of; due to; because of; according to
environmental problem; environmental issue
to think (about, of); to think over; to consider; to bear in mind; to think (that); to believe; to intend (to do)
destruction; disruption; (application) crash
imagination; supposition; guess
not less than; ... and over; beyond (e.g. one's expectations); above; above-mentioned; aforementioned
to surprise; to frighten; to create a stir
construction; establishment
to begin; to start; to happen (again); to begin (anew); to date (from); to originate (in)
crossing; traversing; traversing horizontally; passing west to east (or east to west); cutting horizontally
along; parallel to; in accordance with
furthermore; again; after all; more and more; moreover; even more
to stretch; to extend; to straighten out; to be flattened; to spread (of paint, cream, etc.); to stretch out (e.g. of a hand); to extend